Without knowing more about "somone like you"'s taste, it's hard to recommend anything... That said, I agree with most of the recommendations above. Some games obviously are not nearly as good without extra controllers and someone to play with (wii play, raving rabbits, mario party, smooth moves...)
There is a lot of great stuff coming out between now and the end of the year... RE 4 wii edition (if you haven't already played RE 4), ghost squad, Fire Emblem, Final Fantasy Crystal Chronicles, Super Mario Galaxy, Super Smash Bros. Brawl (probably best multi-player) to name a few...








