(You are human in this and the Cons use their holoforms. You also live with them) 

Megatron

~ At first he thinks that Christmas is a complete waste of time until you convince him that it's not

~ One of the ways you convinced him that Christmas wasn't a waste of time was you wore some 'Sexy Santa' lingerie. Let's just say that you couldn't walk for a while

~ He'll allow you to have a Christmas tree in your shared berthroom

~ When you tell him what mistletoe was he decided to hang some around the Nemesis and he'll make sure that you both always walk under it together

~ One time he and Starscream walked under the mistletoe together (poor traumatized Starscream)

~ He doesn't believe that there's such a thing as the Naughty list. That is, until he found some coal on his nightstand (in which you put there and didn't say a word about it) 

~ He refuses to take you caroling on Christmas Eve

~ If you both have kids he'll remind them that Santa isn't real

~ He will use his holoform so that he can help you bake Christmas cookies

~ Once, you even got him to put Christmas lights on the outside of the Nemesis

 Starscream

~ He's a complete Scrooge during Christmas. He even says ' bah humbug' when you say Merry Christmas

~ He does like the mistletoe though, as long as he's under it with you

~ He'll let you have a Christmas tree in your shared berthroom

~ When you got him to watch 'It's a wonderful life' he actually cried a little

~ Ever since you told him about Santa's naughty list he tries to be nicer to everyone around him

~ He does like hot cocca, especially if it has marshmallows in it 

~ He also loves eating the Christmas cookies that he helps you bake

~ He will secretly leave you a present under your Christmas tree to discover, but if you ask him about it he'll deny that he put it there

~ If you both have kids he refuses to let them believe in Santa 

~ If you both don't have kids you will have some fun On Christmas morning

Soundwave

~ He surprisingly likes Christmas music. He'll even play them on his visor 

~ When no one is around he'll quietly hum some of his favorite Christmas songs

~ If he's using his holoform he'll cuddle with you on your couch while you both watch Christmas movies together

~ He will also let you have a Christmas tree in your shared berthroom

~ He loves spending time with you when you teach him how to bake Christmas cookies

~ He doesn't really like mistletoe unless it's in his and your shared berthroom

~ On Christmas Eve he'll take you window shopping in New York

~ On Christmas Eve he usually sneaks into a nearby animal shelter after it closes for the night and give the animals treats that he somehow got

~ If you both have kids he'll gently remind them that Santa isn't real

~ On Christmas morning you both lay on your bed together and listen to Christmas music

Knockout

~ He loves Christmas, especially the mistletoe

~ He will hang mistletoe in your shared berthroom

~ He also likes helping you decorate Christmas cookies while he's using his holoform

~ He prefers eggnog over hot cocca any day

~ On Christmas Eve he will take you caroling

~ If he finds Christmas themed lingerie he will find a way to get it for you

~ He hates driving in the snow and he really hates snow tires

~ If you both have kids he'll let them believe in Santa

~ If you both don't have kids then you'll put that Christmas lingerie to good use

~ On Christmas night you both will watch the snow fall while standing in the bridge when no one else is there

Breakdown

~ He's a little confused about Christmas until you tell him why and how it's celebrated 

~ He lets you have a little Christmas tree in your shared berthroom

~ Since he secretly cooks and bakes he's pretty good at baking and decorating Christmas cookies with you

~ He likes the idea of standing under the mistletoe with you

~ He'll use his holoform so that he can go caroling with you

~ He loves a candy cane and whipped cream in his hot cocca

~ On Christmas Eve you both watch Christmas movies

~ If you're crying while you both are watching a Hallmark movie he'll let you cry on his holoform's shoulder

~ If you both have kids he'll help them leave milk and cookies near the Christmas tree for Santa

~ On Christmas morning he'll take you to go sledding somewhere

Dreadwing

~ At first he doesn't see the purpose of Christmas. But after you tell him why it's celebrated he kind of understands

~ He will let you have a Christmas tree in your shared berthroom

~ He will also let you hang mistletoe above your shared berthroom door

~ He will admit that Christmas movies such as 'It's a Wonderful life' are very good movies

~ Even though he won't admit it, he hums his favorite Christmas songs when no one is around

~ On Christmas Eve you both will go caroling together

~ He loves baking Christmas cookies with you

~ If you both have kids he'll remind them that Santa isn't real

~ On Christmas Day you both just cuddle and enjoy each other's company

Shockwave

~ He sees absolutely no purpose of celebrating Christmas

~ But he will let you have a table top Christmas tree

~ He will also watch you bake and decorate Christmas cookies

~ On Christmas morning you always find a small present under your little tree

~ You will try and make something to give him

~ If you both have kids he'll tell them that everything Santa does is impossible and illogical

Predaking

~ He loves learning about Christmas

~ He once used his holoform to help you make a snow Predacon

~ He loves baking Christmas cookies with you. But he also loves eating them

~ He'll watch any Christmas movie that you show him, especially if you both get to cuddle while watching them

~ On Christmas Eve he'll get toys and you both will take them to the nearest orphanage

~ You both also go caroling on Christmas Eve

~ He'll stand under the mistletoe with you every chance he gets

~ If you both have kids he'll help them leave milk and cookies out for Santa and he'll help them write thank you letters

~ On Christmas morning you both will give each other a present

5t3v3/Steve

~ He loves everything about Christmas. The decorations, the cookies, the mistletoe, the movies and the presents, he just loves it all

~ Since you were givin a berthroom to live in and invited him to live with you, you both get a Christmas tree

~ He'll get matching ugly Christmas sweaters for you and his holoform to wear

~ He somewhat believes that Santa is real

~ He loves helping you bake and decorate Christmas cookies

~ On Christmas Eve you both will go caroling

~ He likes his hot cocca with whipped cream, marshmallows and a candy cane

~ If you both have kids he'll get gingerbread house kits for them to decorate

~ You both will also take them to see Santa at the closest mall

~ On Christmas morning you both will watch a Hallmark Christmas movie while cuddling and kissing on your couch

Airachnid

~ She absolutely doesn't like Christmas

~ She has tried setting traps for Santa, but she's never caught him

~ You once found a way to leave a pile of coal on her berth after you told her about Santa's naughty list

~ She will admit that you make good Christmas cookies

~ She will also let you have a Christmas tree

~ If you both have kids she always tells them that Santa isn't real