Adam Milligan~

Adam is completely comfortable with PDA. He enjoys wrapping an arm around your waist and kissing your cheek out in public, and likes to lock pinkies with you when you're walking somewhere.

Balthazar~

He doesn't mind a little PDA. He's not a huge fan of it, but he'll hold your hand occasionnally while walking in art museums while on dates to show that you're his.

Bobby Singer~

Surprisingly, Bobby doesn't mind PDA, although he'll only hold your hands. He'll randomly grab your hand while out with you on those rare shopping trips, and only lets go when you make him.

Castiel~

Castiel isn't completely used to all human customs, but after explaining what it is, he became a big fan of PDA. He is more than happy to press random kisses to your cheeks or forehead while out, and enjoys twining his fingers with yours.

Crowley~

Crowley likes to show off that you're his, and to do so, he usually always has an arm around your waist while out with you, and will pull you closer to kiss you deeply if someone stares for too long.

Dean Winchester~

Dean, not unexpectedly loves PDA. He likes to slip a hand in your back pockets while your wearing jeans to playfully squeeze your rear, and will always press little kisses to your shoulders and neck
if you take too long looking at an outfit or a dress.

Gabriel~

Gabriel doesn't hate PDA, but he also doesn't quite love it. He enjoys holding your hands, and wrapping an arm around you to keep you close to his side, but after a while of hand holding, his fingers starts to tingle from being so still for so long and he has to let go.

Lucifer~

Lucifer hates PDA. He doesn't like the thought of anyone seeing his softer side. The most he'll do is allow you to link arms with him while walking through stores.
Though occasionnally, if there isn't many people around, he'll give you a quick kiss on your forehead.

Sam Winchester~

Sam finds PDA slightly embarrassing, and doesn't particularly like to stay too close to you while you're out, because he knows that if he turns too fast or stops too quickly, he could either elbow you in the face accidently, or clothesline you when pointing to something. However, he will kiss your forehead and lips to show other men to back off when needed.