STEVEbeing a gentleman he is, he hugs you gently and it always make you sleepy. his hugs are always resting, and kinda over-protective. sometimes he rub your back or kiss your forehead, making you blush.
TONY
if you're expecting a soft hugs from the tony stark, you better not. because, well he is tony stark. he always rest his hand on your waist and butt, but you don't mind at all. and it always heated and turn into a make-out session. but still, he will hug you gently if you're sad/upset.
THOR
he is like a giant teddy bear, well, not comfy though. his muscular body always crushing your bones. he always rest his chin on your head because you're shorter, a lot shorter, than him. it always end up with you pulling away, his hugs making you breathless.
CLINT
he is not a romantic person, so his hugs are just like he put his hand around your shoulder, or waist sometimes. but when you're super sad, first thing he'll do is hug you, tightly, and you absolutely love it when he do this.
BRUCE
he prefer not to. he always scared that he would over-embarrassed and hulked out, and kill you, of course. so it's more like you're the one who hug him, a 'dont worry, you'd not hurt me' hug. but he loves holding your hand. he says that your hand is so tiny and cute.
LOKI
surprisingly, being a god of mischief, he is hug-able and loves to share a hug with you. he always hug you and rests his head on your shoulder, or you rests your head on his chest, he will whisper some sweet words that only makes you blush.
BUCKY
same as bruce, he's insecure about his metal arm. he always tell you that his metal arm would scare you. but the truth is, you love his metal arm. so instead of a hug, he will just kiss you, a passionate kiss that turns into a make-out session, though.