If can beat Ikaruga, you must try Trauma Center Second Opinion, Trauma Center New Blood and Fire Emblem Radiant Dawn on the hardest setting.
I recommend (core):
Zelda TP
Super Mario Galaxy
Metroid Prime 3
Resident Evil 4
Resident Evil UC, Ghost Squad or House of the Dead 2+3 (get only one of them)
Trauma Center SO
Fire Emblem RD
Zack and Wiki
Super Paper Mario
Casual:
Wario Ware
Wii Sports (it is the best casual multiplayer you will ever find)
Satan said:
"You are for ever angry, all you care about is intelligence, but I repeat again that I would give away all this superstellar life, all the ranks and honours, simply to be transformed into the soul of a merchant's wife weighing eighteen stone and set candles at God's shrine."