If your boyfriend is super clingy/cutesy, would you find it gross= =?

How is that disgusting? Affectionate gestures in private are special intimate moments! If the other person is that cute, I'd actually find it heartwarming. Are you that type too?

Pouting/acting cute isn't the problem, it's the content or purpose of the pouting, right? Or maybe if you think you're acting cute, but you're just imitating the kind of things girls usually do when they act cute, then girls might not see it as them being acted cute towards?

This question depends on how much you love him.

Privately it's fine, but in public settings it might depend on the atmosphere. Ultimately, I think personality is key. Everyone feels differently, and relationships have a period of adjustment. You could also try asking them directly or probing a bit.