Some of my favorites that I regularly go back to are Degrees of Lewdity, Lost Chapter, and Portals of Phereon. Though an all time classic for me would be Kunoichi Botan or Sengoku Rance.
I'm also eagerly anticipating the first day update for GYYO. Those poor yordles need to get off.
Agreed, some sound is better than no sound at all in almost all cases to me. Good sound design for including lewd sounds would be preferred, but mediocre is okay since thats still better than nothing. They have to be done reaaaally badly to take me out of the game. Which thankfully I haven't...