One of us...
For the family
Wii Play + remote is a very good idea - though the fishing game on their isn't the best
Wii Music and Wii Fit are very accessible and fun
Mario Kart - My parents love it
Kororinpa or Mercury Meltdown are fun
Boom Blox
de Blob
For you
Metroid, Mario Galaxy, Zelda are really good, but you probably already know if you like those franchises
No more Heroes is good
Fire Emblem