This should keep you going for a while
Divinity: Original Sin (excellent fantasy ‘old style’ RPG)
Wasteland 2 (another old style RPG, less depth then Divinity but still very good)
Tomb Raider (Really, really good, forget previous tomb raider games, just play this)
Bioshock series (in particular Bioshock: Infinate being my favourite)
Shadows of Mordor (the nemesis system makes this game really fun)
Telltales Walking Dead (or any of their ‘storyboard’ games, walking dead is my fav tho)
Skyrim (basic game is OK, but there are some truly amazing mods out there, and a lot of terrible one’s also, check out the thread on this before installing willy-nilly, but they can turn this into a truly epic looking and playing game)
Mass Effect Series (ME1 can be a bit tough to play through now as it shows its age in UI and Gameplay but the story is excellent, (look for some mods that improve gfx/ui/gameplay for all 3 games, can be a pain to get going but make a big difference, and playing all 3 (or at least 2 & 3) will certainly make the feels hit you a lot more, I dare you not to cry on Tuchanka)
Dragon Age Series (Inquisition is a very good good game and looks great, Origins is dated (mods can help here) but still a great story, Dragon Age 2 is fun with all the DLC but definitely the weakest of the three)
Witcher 2
Batman Arkham series
Xcom: enemy unknown + enemy within expantion
Max Payne 3 (and 2 if you haven’t played that before as it’s the best one)
Metro 2033 and last light (redux versions)
South Park: The stick of truth (if you like the tv series you’ll love this)
For less story but good gameplay;
Diablo 3 + Reaper of souls
Civiiation5 + expansions
Arma 3 (Single player campaign is surprisingly good, also an excellent military sim with a ton of mods to suit your style, and zombies if you want)