Gabriel:
     Even if you weren't dating Gabriel, you feel like you would still be best friends, due to his personality and sense of humor. Gabriel is a giant dork who always knows just how to make you laugh.
     But since you are dating, your relationship is even stronger. Gabriel may not seem the type due to his past (*cough* Casa Erotica *cough*), but he is a very romantic type of guy, always wanting you to be happy and he will due whatever it takes to put a smile on your face.
     And of course there's sexual tension but he never forces you to do anything you're not ready for.
(This is my kinda man!)

Sam:
     Sam is the most nerdy and sweet guy you've ever met. He would literally move heaven, hell, and earth for you if it would make you smile that sweet smile that never fails to make him go weak. There is literally no other way to explain it: you are his weakness.
     He has even admitted on occasion that he would live for you, die for you, be imprisoned for you, and follow you to the ends of the earth to be with you. That's just how devoted he is to your relationship.

Dean:
     You had fully expected that Dean wasn't the kind of guy that was into relationships and monogamy. However, when you started dating, Dean made it perfectly honest that you were the only girl he wanted.
     He's the overprotective kind of boyfriend, to the point that if you get hurt, he will blame himself every time. It can get annoying at times, especially when you know you can take care of yourself but you let him have control because it's the best way to keep him happy.

Cas:
    It's been obvious from the beginning that Castiel is a very awkward guy and doesn't know a lot about relationships. So it's no surprise that he's awkward when getting into new things in your relationship and sometimes takes things the wrong way.
     He does what he thinks is best for you, however, and does his best to be a good boyfriend.

Crowley:
     Your relationship with Crowley is actually very good considering the fact that he considers you very important to him and does everything in his power to make you happy.
    He's controlling but mostly because he wants to keep you safe. You were the one who managed to get under his skin and worm your way into his heart and he couldn't bare to lose you, as he might just go on a murderous rampage.

Adam:
     Adam is an in-between of Sam and Dean. He's a sweetheart but he's way overprotective (both because you're his girlfriend and mistress).

Jack:
     Since Jack has the mind of a child and doesn't understand most social cues and such, he constantly looks to you for guidance on what to do. He always waits for you to make the first move and listens to what you have to say.
     He finds himself very protective of you and wants to do whatever it takes to keep you by his side...forever.

Lucifer:
     Despite what everyone thinks of Lucifer, he's a good boyfriend. He cares about you and wants to keep you safe so oftentimes he's very overprotective and controlling.
     He is also the jealous type which can result in some issues but the reason he acts that way is because he is utterly terrified that you will leave him for someone better and that you too will see the monster that everyone else does. It's kind of like a Rumbelle sort of relationship.

Michael:
     Michael is a very busy guy so he doesn't always have time for you but he tries his best to be around you and make it up to you if he can't. He's overprotective of you and very controlling, even more so than Lucy because he's used to being in charge and that's what he thinks is best.