Tony-
You just keep poking him until he gets annoyed.

Wanda-
You pick her up and throw her in a pool which annoys the heck out of her.

Clint-
You steal his stuff.

Steve-
When you distract him from painting and mess up his work.

Bruce-
When you keep poking him but you stop when he gets angry.

Peter-
When you take his web shooters.

Thor-
When you take his cape.

Natasha-
When you don't let her train.

Loki-
When you don't let him pull a prank.

Bucky-
When you keep commenting on his metal arm that he hates.