In order of how much I enjoyed them:
- Morrowind *
- Gothic (the first one)
- Star Trek Bridge Commander
- Freelancer
- The Dig
Morrowind was the first and only game I ever did a narration on. Played the thing three times, and the third game took 2 years and 9 months to finish because of the storyline.
BTW, Bridge Commander caused me to generate a ton of screen shots, but I have to say that by the end of the game, I wanted to KILL the first officer.