Steve: Steve always asked permission before he kissed you, even after you guys were married. They were usually gentle and loving, but there were times when desperately missed you and they got a little... Out of control. His kisses happened often, and he did them in front of others, but never anything more.

Tony: Most of your kisses with Tony were rough and passionate, and they usually became a full-on make-out session after about 15 seconds. He would kiss you in front of anybody, everybody, and there were moments when you got a little farther than you should've in front of other people.

Bruce: Bruce's kisses were short and sweet, but they were always full of love. Usually, you'd start the kiss, if it was going to be a longer one, but his lips gladly connected with yours. He had his doubts about kissing around others for awhile, because he didn't really want to make it official between you until he was ready, but there were sparse kisses every once in awhile.

Clint: His kisses had all sorts of emotion in them, since he usually didn't show outside affection. They'd be combinations of love, lust, determination, whatever he'd felt that day (the good emotions). Then you'd mumble stuff against each other's lips. He didn't mind you kissing him, but in public, he never kissed back. He was the emotionless assassin, and not even you could change that in public.

Thor: Thor's kisses were simply great. He'd hold you in his arms and quickly press his lips onto yours, before deepening it. He loved kissing in front of others. It was a way of showing you were his and he was yours and nothing would change that.

Loki: Loki's kisses were always full of passion and intensity. He did them whenever you were angry to calm you down, and he would always have his fingers intertwined with your hair. He wasn't opposed to kissing in front of others, but he didn't do it often.

Bucky: His kisses with always flirtatious and rambunctious, like he was a naughty puppy begging for mercy. Of course, the puppy got his mercy. He would kiss in front of others, but not like he normally did, it would be a more reserved kiss.

(Now, now, I know you were expecting where he likes to kiss you, but that will come, darlings, that will come.)