Hey, anyone want to buy a membership in the Federation? I can sell you one because I just saw...
"Live Fast and Prosper"
I love comedy episodes, and a comedy episode with a fake Voyager crew is a total can't-miss for me.
Fake Janeway was great, but Fake Tuvok really took the cake. I love how he got so deeply into the character of Tuvok that he tried to think as a Vulcan. And that look of absolute fanboy when he finally said "Commander Tuvok!" was priceless. Was this a subtle commentary on fandom? Maybe.
And Neelix and Tom getting conned was pretty funny, as was their soul-searching. And Ethan Phillips had a really, really good scene with Fake Janeway.
The double-con on the Fake Voyagers was fun--at first I didn't really know what was going on with Fake Janeway, but as soon as she got hit with the phaser, I knew it was the Doctor.
At this stage in Trek, I like these shows where they aren't taking the show quite as seriously, and are often providing a commentary on the show itself, better than a lot of the "regular" episodes.
I took a look at the season 6 episode list, and I find it interesting that the episodes I like tend to either be relatively light ("Virtuoso," "The Voyager Conspiracy," "Tinker Tenor Doctor Spy," or character studies ("Barge of the Dead," "Riddles"). I also like the slightly unusual action/exploration stories ("Blink of an Eye," "One Small Step"). That doesn't mean anything that I can figure out, but it's where I'm coming from. I really wonder what I would have thought 15 years ago. For example, when I first saw "Hollow Pursuits" as a teenager, I absolutely hated it and Barclay. Now it's one of my favorites.
If Fake Janeway hadn't tried to "escape," I wonder if Janeway would have let them stay on Voyager after they paid restitution. I can't see Fake Chakotay wanting to stay, but I definitely could see Fake Tuvok staying and becoming a foil for Tuvok to rival Neelix.
It's neat to think of an alternate Voyager that's an island of misfit toys, with various characters picked up along the way--Kashyk, Daniel Dae Kim's character from "Blink of an Eye," some of the Equinox crew, a Hirogen, you name it.