Hey, it's a perfectly valid vote.
For personal "it's a flirt I'd have enjoyed seeing in the game, had I not written it" value, I'd probably have to go with the Druid Mind Meld.
Although easily the flirt that has resulted in my favorite player response is Jaheira's "eat your veggies" flirt.
Later on I'll have a look and see what my favorite not-written-by-me flirt is, aside from "all the Anomen ones I didn't have to write" as a blanket category. Which I don't mean in a very negative way--most of the fan faves for Anomen came from other writers, and that tells me that it's a very very good thing that they were carrying a lot of the load.