Tony
Takes something if yours or when you're both in public he whines and holds you really close to him
Steve
He doesn't do much maybe pout but if he feels like he needs lots of attention one day he'll start peppering kisses all over your face
Bucky
Say you're distracted by your phone and Bucky wants your attention he'll keep saying your name or nickname he has for you
Clint
Pokes you anywhere on your body
Stephen
Snuggles up to you and starts talking
T'challa
Generally he doesn't really do anything it's mainly you trying to get his attention since he's always really busy
Loki
He'll follow you around being completely silent and when you turn around to tell him to stop following you he picks you up and over his shoulder demanding ( in a cute way) for your attention
Thor
Much like Tony he takes something of yours and hides it
Bruce
Makes something cute for you that's all
Sam
He tickles you for attention or pulls you close to him
Pietro
He runs circles around you until you tell him to stop
Wanda
Like Stephen she snuggles into you and start talking
Natasha
She starts planting kisses anywhere on your body