Twisted story and plots, try the quests maybe, my view is that if you pick and choose the ones that you fancy, you should be well satisfied.
I think Tenpenny Tower was quite involved with plenty of judgement calls, no simple answer, ping-pong back and forth here and there, a small game in itself with many possible outcomes. Action and dialogue.
Deliver a letter to Arup, that can widen out to a very involved small-game in itself, pretty good dialogue when interfacing with the NPCs, and again plenty of judgement calls, no one simple answer, ping-pong back and forth here and there, many possible outcomes. Action and dialogue.
Plot-lines, Bethesda were always good at that, as shown in Morrowind, you don't get deeper than that.
Plenty of choices, plenty of options. Bethesda known for always building on the previous, and they did it with Fallout 1 and 2, and like the OP gave, two thumbs up.
It’s a game that you can play any way you like, focussing on a particular type of play that you fancy at that particular moment ... questing, exploring, action, or a mix, or doing the main quest or whatever.
The player cannot fail to be satisfied that way, and if he is he can always ask himself "what am I doing wrong" ... and fix it ... have fun.