I was close to putting Ro on there, but felt the others were better. How great would it have been to have Shran on TNG instead of Enterprise?
I didn't put Work because, though there were a lot of Worf-centric episodes, they generally weren't all that great. I didn't like work that much until I rewatched DS9 and came to appreciate him as he came into his own.
I wasn't a Tasha Yar fan. The episode where she was crying on the bridge and had to be comforted by Picard was embarrassing. Sure, she has emotions, but that was so badly acted it was comical.
I'm going to do a top 5 worst characters from TNG in the future. It'll be interesting to see who people think should be in or out. There are a few obvious choices, but then it gets murky.