Right now, he likes Tony getting in his personal space. Rational like he is now, he's far more patient and able to accept this kind of treatment. An angrier Hulk would be far less accepting, and the Hulk sees that as Tony gets more comfortable. He sighs, though it's more of a snort, and he curls his arm around where Tony's propped against him.

"Keep Hulk pillow. Keep title too." That's how much he likes Tin Man. After a second to think, he actually tries to tickle Tony, though for him that means one finger only probing around where Tony's ribs are. He really is trying to tickle, his touch gentle.