This may be in part due to the pretty woeful retail releases so far this year, culminating in the worst ever gaming retail sales a week or so back
Seems to be that the gaming world needs to get away from the endless releases of identikit banality and embrace a bit more of the creativity that's out there making innovative games, such as was the case with Portal 2.
Since January I've greatly enjoyed Quarrel, Double Fine Happy Action Theater, Gotham City Imposters, I Am Alive, Fez, The Walking Dead, Minecraft, Spelunky, Quantum Conundrum and Deadlight. I know others have enjoyed the Alan Wake game, Journey and Trials Evolution.
Other than Mass Effect 3, I've been largely disappointed by the rest of the year's full-price offerings. I know there's some gems (hopefully) to come but seems like if you want to play a genuinely interesting and different game then you need to turn to dlc games.