Braid was original in gameplay and story, so while it's not a game I'd recommend to everyone, saying it's bad across the board is missing the point.
The Descent series, Freespace included.
Aliens vs Predator (not the new ones)
Ghost Recon series
Splinter Cell (Conviction, and the first one)
Saints Row 2-3 (though 2 was buggy)
Limbo (for the atmosphere mostly)
Guild Wars 1-2
Orcs Must Die
Plants vs Zombies ;)
Rockband series (drums!!)
Metroid & Megaman & Castlevania, the 2D ones
Warcraft 3 (I didn't try 1-2 unfortunately)
Dungeon Siege 1-2
Shadow of the Colossus