I agree with Alpheus, it's the game problem, not yours. Nowadays games are getting longer and longer but there really is no incentive to keep the player hooked with the game. Maybe the Achievements kinda do that, but what else?
That's why I still love games from the Snes - Nes era, they were short but challenging, and if you beat it you felt really good about it. Megaman 9, which is my newest game, I already finish it like 10 times and want to play it more, where Twilight Princess that was my first game I still haven't finished it once.
My recommendation would be to try different games, maybe shorter games but with lots of replay value.
Castlevania Judgment FC: 1161 - 3389 - 1512
3DS Friend Code: 3480-2746-6289
Wii Friend Code: 4268-9719-1932-3069
