Seeing as how we all enjoy silly ideas (sarcasm) I thought I'd mention a few in-game enjoyments that could be considered when one is burnt out in survival mode....
- Chess & Checker board (to play)
- Hockey (only a stick & a puck)
- Football (Soccer ball only)
- Badminton & Tennis.
I'm now going to defend these thoughts because they add more things to do in the game on the side of things. Minecraft had these as plug-ins, Grand Theft Auto Online allowed you to do this for fun so I see why not in adding this into this game. I already see people posting up stadiums so might as well make use of them. Even Playstation Home had these mini-games so might as well have fun with these when the game is considered 'complete'. More to do is always a bonus.
I also stand by my suggestions of riding moose, having NPCs play custom music for you, and having pirates attack you on the high seas.