Halo - Awsome multiplayer, but isn't strong enough to carry the lame story, AI and design.
Final Fantasy - Other JRPGs have done better in recent years.
Half Life - This franchise receives so much praise and besides colour, good voice-acting and flashy graphics for it's time, it just acks every other important element.
Mario in general - Had Mario stuck to maybe two fantastic games every generation, I would still have a little respect for it ( like I do for Zelda), but it's gotten to the point where Mario is a 50 year old over used prostitute and Nintendo is the aggressive pimp.
Bet with Conegamer and AussieGecko that the PS3 will have more exclusives in 2011 than the Wii or 360... or something.