What has happened to my thread!?
Sorry about that, Chief.
I didn't like the Barclay crossovers that much because they just came out of nowhere, even that really early one (Projections). I think they used him a little too much, with more appearances than series TNG, but I always liked watching Dwight Schultz get outside Howling Mad Murdock, where I'd first seen him.
And Neelix was my least favorite character, though Ethan Phillips did an excellent job at making him annoying and could make the character sympathetic. Neelix only wanted to be liked and feel useful.