Re: I hate the Q character, but admit he was funny as hell in QLess
Picard in Emissary ring a bell? Not to mention Lursa and B'etor from Past Prologue too. Then Quark shows in TNG when they're after them in a later episode. For that matter, the whole O'brien character's being cast as a regular was probably influenced by giving TNG fans a familiar character.
"I was never a Star Trek fan." J.J. Abrams