I'm torn between Warcraft and Final Fantasy myself. Both have a good number of games - very, very big games at that - and both have at least one MMO on offer as well. I may have to give it to FF because, for one thing, TWO MMOS good gracious, and secondly, some of the other games are timless classics too. But... I don't know, Warcraft II and III, to say nothing of WoW...

I wouldn't be entirely dissatisfied with something like Mario or something with a good online component like Halo, either. And I could survive, if imperfectly, on a sportsball franchise or something too.