Looking for a fun pc game?

I've played A LOT of games, i can't stress that enough. I prefer the rpg/adventure series of games. I'm not into pvp that much so games like COD and Boyfriend are out of the picture. I do not like racing games or fighter gamers like tekken or street fighter, i'm also not a fan of horror games or sports games. I'm looking for a fun single player game with a great story and something i can spend a lot of time on. I really like customization. Off the top of my head the best game i've ever played is Farcry 3, The incredible storyline and cool customization for your guns were awesome. The free roam and challenges were lots of fun, my only complaint is that it ended too soon. I will list all the games i can remember have played: Dead Space series(Nah, scary) Fallout 1,3,4(Really fun!) Elder Scrolls series (Again an amazing series and i'm currently playing ESO) Infamous series(Fun but not enough customization and super powers is not really my thing) The Last of Us (Not free roam but an amazing story none the less) Assasin's creed (Boring game but fun for a while) Dark souls (Fun but Hard) Halo (Good Storyline but repetitive/no customization). There are a ton more games i haven't listed but i think you get the point. I'm also really into the Zombie survival aspect like: Warz/Minecraft/Dayz/Rust Thanks for all the responses you are really helping me out with my gaming life!