Questions about what to play

[mattlistener]

Most of my favorite solo computer games over the years have been RPGs. Ultima IV was a formative experience.

But increasingly, I find I'm not finishing them. I pick good ones to play, and typically enjoy them a lot at the start, but after a while when I sit down to play something I find that the pull to that particular game has faded away. Often it's some form of "it just takes too darned long to *do* things."

So, gamer friends, two questions. What recommendations do you have for me, in light of the of games I finished and loved?

And which, of my unfinished games below, do you heartily recommend I play through to the end?

Finished and loved:
Bastion
Bioshock Infinite
Deus Ex and Deus Ex: Human Revolution
Portal and Portal 2
Rogue Legacy
Skyrim
The Swapper
Vessel

Started and thought I'd like, but have left unfinished:
Antichamber
Avernum*, Geneforge*, Avadon* (I've started ~10 of Spiderweb's games, and finished 2)
Divine Divinity
Dragon Age: Origins
Half-Life 2
Mass Effect 2
Planescape: Torment
Star Wars Knights of the Old Republic 2
Psychonauts
Torchlight, with Synergies mod
Unepic
The Witcher and The Witcher 2