Couch co-op, split-screen, hotseat; Kingdom Two Crowns is nice. So is Darksiders Genesis, For The King, Moon Hunters, Trine, etc.
Always on the lookout for other good co-op couch games, especially with a good story, but I feel that they are few and far between. :(
I had quite some beef with the tethered caps in the beginning when they didn’t latch properly, but have since gotten used to them. That said:
Obviously not much of a problem. I’d need to clean my facial hair either way if eating ice cream or other messy foods, but cap rotation might not be effective if your “face” sticks out 1-2cm from your mouth.
One could also attempt to rotate the cap in a way to achieve quantum tunneling, but I don’t feel that I’ve achieved that level of “tethered cap proficiency” yet.