We're talking about Tuvok epsiodes and I saw one last week that I haven't seen that much of, Alter Ego. This is an episode that doesn't get talked about very much, but I gained a new appreciation for it. I kind of felt bad for Maryana, and the scene with the real Maryana and Tuvok on the station kind of reminded me of the one with Noss and Tuvok in Gravity.
As for the episodes mentioned in the thread:
Meld - Great episode and great introduction to Suder
Gravity - Not necessarily a favorite, but there was some good stuff going for it.
Riddles - Like Alter Ego, gained a new appreciation for this one. Kinda wished they allowed Tuvok to be that way for a while. Also, the stuff with Neelix and Tuvok were always welcome on this show.