(on rails are actually great... especially if your life is shared as in RE UC cause you can bail her out)
So the best so far for me:
MK Wii (especially online with friends :p, the best one by far)
RE UC (even if she sucks she won't know it!!)
Castle Crashers (with blood turned off)
RRR 1 & 3
BoomBlox (though she doesn't like to compete too much...)
Eternal Sonata (give her the kid that shoots so she does'nt have to move :p)
Super Smash brothers (she likes it, that I can't figure why considering the other tastes)
Mario galaxy (likes being the star....)
to a lower extend:
try gears for FPS... as you can hide, that helps!
big noes:
Halo (can't control double analog... single analog too but double is exponentially worse)
Sports game like madden (how do you play this sport?)
OoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoO