I'm about halfway through
Knights of the Old Republic. I'm very satisfied with the purchase, and it was clearly a major setup for many of the later BioWare games. Without KOTOR, there wouldn't be a Mass Effect in the shape it was in.
Most of the -moral dilemma- choices are pretty straightforward, though Manaan threw me for a loop.
The game's about as close as I'll get to enjoy D&D gameplay. I rolled a Jedi Consular this time, and it's panned out pretty well. Most of the jedi powers are more buffing and stuns, I guess that makes Jedi the Science-Fiction Paladins

Graphically, it holds up
very well. With antialiasing and every other bell & whistle on max, it stands up nicely. They dropped the ball on resolutions, methinks. If you're going to release a major game like this on GoG, it'd be smart to have more than 4 available.
Thief and a few others had similar issues and got patched later on. If they patch up KOTOR, I'd consider rolling sith for a second replay.
Also, funny exploit I found: