If you're itching for some interesting (and lengthy) RPGs to sink your teeth into, you might want to check out the currently ongoing Humble Bundle. Among other things, it features Obsidian's Pillars of Eternity and Tyranny, as well as the Borderlands: Game of the Year Enhanced for those of you that are more multiplayer-inclined.
The bundle will stick around for another ~12 days, so should have plenty of time to make a decision on whether any of the games are up your alley. Personally, and you can probably already guess this given that it's in the title, I would highly recommend both Pillars of Eternity and Tyranny if you're into classic RPGs. They may be a little bit janky when it comes to the combat mechanics, but their stories and characters are highly intriguing, and well worth checking out while they're this cheap.
As for Borderlands, I would put that into the "only play this with friends" category. Now don't get me wrong, I'm not saying Borderlands is bad, but unlike its sequel it does get a little bit grindy if you're all on your own. But if you can wrangle a few friends to play it with you, then chances are you'll have a pretty darn good time with it!
Whatever your tastes may be, you can find the full list of games, as well as potentially grab the bundle yourself, over at the Humble Bundle website. Enjoy!