Depends what kind of games you like!!
Wii sports is ace for family game ... bowling! Can get quite real & competitive (sp).
Mario Party 8 - well if your a mario fan & like previous games then its a good one .. its like a board game with mini games after each roll of dice. Is quite fun for family, friends, just you two! Frustrating too https://www.freebievillage.co.uk/images/smiles/icon_twisted.gif
Rayman - Task games I guess. Quite enjoyable/fun between 2 players not my fav though!
Monkeyball - Fun & competitive also with mini games for two players
Sonic - excellant according to my OH I've not really played it.
Big brain is suppose to be fun for all & Wario smooth moves with a couple of glasses of wine & friends lol