[edited]
Steve:
Hugs with Steve are long and nice. He doesn't want you to get hurt and wants you to be by his side, 24/7.
Tony:
Hugs with Tony are fun. He sometimes picks you up and twirls you around, which is adorable.
Clint:
Hugs with Clint are short and sweet. These small hugs are perfect for the both of you.
Bruce:
Hugs with Bruce are cozy. He loves you and you love him. It's perfect. Duh!
Thor:
Hugs with Thor are gentle (surprisingly) because you have a steady, gentle relationship.
Loki:
Hugs with Loki don't happen often. But when they do, it's when you are upset, when he's upset, or after an argument.
Bucky:
Hugs with Bucky are cute. He hugs you from behind, or you hug him from behind.
Quicksilver:
Hugs with Pietro are crazy and fun. Sometimes they're short hugs, or sometimes he runs anywhere with you in his arms.