I agree with you on:
- BioShock Infinite (1 was amazing, Infinite just didn't have the same spark)
- Metal Gear Solid 4 (I love the PS2 versions, and this was a big departure from the gameplay I loved)
3 additional:
- Uncharted 3 (Story was meh, and after 2 this was a letdown)
- FF13 (Never played a FF before, tried to play this since it was getting a lot of attention. Holy hell I hated it)
- GTA4 (It just wasn't fun, tried to play through the story 3 times and I can't bring myself to finish it)
Platinums: Red Dead Redemption, Killzone 2, LittleBigPlanet, Terminator Salvation, Uncharted 1, inFamous Second Son, Rocket League