1. Madden - i truly wish i could enjoy these games but they just bore me to death. Probably because I have no interest in sports.
2. GTA (after 2)- the series just got way too realistic and way less arcadey fun. Pop-in, jerky and glitch ridden animation and slowdown ruin the atmosphere which i found boring most of the time.
3. Wii Sports -My second biggest disappointment from Nintendo. I found it to be really shallow and boring.
4. Nintendogs. - My biggest disappointment from Nintendo. I can't believe rub your tamagotchi was that mind blowing or fun for so many people.
5. Metal Gear Solid - Fun to watch but a chore to play. It's like you have to stop every 3 minutes to listen to assholes talk and philosophize.
6. Prince of Persia - If i didn't have to fight things this would be an awesome game. But combat is clunky and boring and is only frustrating when you could be doing more bad ass platforming.
I loathe FPS in general. It rather upsets me that it gets so many games constantly announced and my favorite genres seem forgotten.