Steve Rogers
He's the hopeless romantic type, he loves to please you any way he can because he just wants you to be happy.
Tony Stark
He's the type to give you what you want, material-wise, in an attempt to make and keep you happy.
Bruce Banner
He's the nervous type, the one who always feels that he isn't good enough for you.
Thor Odinson
He's the proud type, having no worries about your relationship at all but he does like to offer you any and everything he can to be sure you are happy.
Loki Laufeyson
He's the insecure and over-protective type, the type of boyfriend who always worries about where you are and who you're with. He's afraid to lose you and so he can get over-protective.
Clint Barton
He's the fun type, always making jokes and taking you out to do something fun. He loves to hear you laugh and see you smile.
James "Bucky" Barnes
He's a worrier, the type of boyfriend but because of his past it's pretty understandable. He wants nothing more than to keep you around and see you happy with him.
Sam Wilson
He's the romantic type, he loves to spoil you and loves to come up with new ways to make you blush and smile.