'Gaming' is only worth it if you're having fun. If you're not having fun playing what you already own then you're just not into it anymore or the games that you have are the wrong games for you. Personally, I can't stand Bioware RPGs or Bethesda's walking simulators like TES games or Fallout 3... but I still buy them expecting a surprise. The pacing of the BioWare/Bethesda non-linear games just doesn't work for me. I'm not completely against non-linear games though since Rockstar's sandbox games, like Grand Theft Auto 4 and Red Dead Redemption, are always worth my time and are worthy of full completion.
Maybe you need to consume your games in smaller bites by taking games that can be beaten or enjoyed without spending dozens or hundreds of hours in a single playthrough? Check out the HumbleBundle.com since they have eight games that you could get through donating to some charity and/or the developers... and if you like them on Facebook, you'll know whenever new bundles surface. That's a good way to find some enjoyable and unique experiences.
Personally, I like the Diablo-esqe games where I can play by myself and just mindlessly kill stuff. Torchlight does this, too, but without any story and with a smaller pricetag. Both games are fun and you can 'progress' a little bit each night without getting wrapped up in forever-long quest chains or 10 minute long story cut scenes.
Another game you might have fun with is Sim City. Sim City is releasing a new game in the next year, but
Sim City 4 is still around for pretty cheap. I think you'll enjoy it because the game is all about management, design and money.
If you like FPS games just buy Battlefield 3 and play multi-player. The game is gratifying in the sense that almost everything you do will contribute to the success of the team; resupply your squad, revive fallen soldiers, lay suppression fire, man a tank or fly a jet.
A PS Vita/PSP has a lot of old-style RPGs and platformers, via the PS Store, so if you're looking for something to play while in bed (or on the shitter) then that might be worth checking out.