I own Wasteland 2 but I haven't been able to make myself play it. It's my own failing, but it's just so old-school. It's very hard to find a game that keeps old-school charm without the old-school mechanics.
I remember getting to the 2nd map (Los Angles?) and the first mission was this huge map which was hardly used. Massive waste of my time baby sitting and watching people walk.
And that was when I had enough of the game designers wasting my time so much and stopped.
Shadowrun: Dragonfall and Hong Kong are also really good. I hear "Returns" was OK but not nearly as good as those, haven't bothered with it.
Divinity: Original Sin seemed really promising but I got sick of it crashing like 1/hr and dropped it.
Perspective: aging former gamer whose access to long gaming sessions for deep single-player stuff is now tightly restricted by adult responsibilities—i.e., kids.
Favorite older games of that sort, for reference, are Baldur's Gate, FO1 and (especially) 2, Arcanum, and (stretching "that sort" a bit) Darklands. Still haven't beaten Planescape: Torment after my game started repeatably crashing ~2/3 of the way through years ago, but that was really good.
The story lines are linear, but the stories are rather good. There's a lot of user generated content, and some are OK, but none of them are as good as the original. (I _think_ someone remade the original game's campaign in the Hong Kong engine, but don't recall for sure.)
DoS 1/2: Never had any crash in either game and played both from release on.
No need to play the first.