As an opening statement, let me say that I literally grew up on TNG. I'm just old enough (40) to have watched some TOS/TAS in my childhood before TNG premiered, but I absolutely remember the excitement of watching Encounter at Farpoint at an eight-year old, and stayed with the series all the way to the end. DS9 eventually surpassed it as my favorite, but it still holds a warm place in my heart as a series overall. Nonetheless, a few years back I rewatched all of the show, and one thing really stood out to me - that the majority of the characters - even ones I loved as a child - didn't really have any definable personalities. I would say Picard, Data, and Worf absolutely do, but the rest...I'm just at a loss. I mean, partially due to the touch of Michael Piller, we do get lots of little character quirks which are referred to over time. Things like Riker playing the trombone, Troi loving chocolate, Worf and prune juice, etc. But those little character moments aren't the same thing as characterization. Going through the non Picard/Data/Worf characters: Riker: Starts out a horndog that will screw anything. Ends up getting somewhat "domesticated" over the course of the show, which is something of an arc. But we never really get much insight into who he is as a person. Geordi: Basically his only definable trait beyond his blindness and his work is that he's horrible with women. Beverly: Has no personality, or at least no consistent one. She's only really defined by her work and her relationships with her son and Jean Luc. Troi: Similar to Beverly, there's not really much you can point to with her that is consistent in her character. Her role on the ship and her "superpowers" are somewhat less mutable I suppose, but that's not the same thing as a character. Note in all cases, I think the actors did a fine job with the portrayals - which resulted in a lot more being there than was on the page. It's just the characters as written don't really come across as consistent people most of the time. I'd actually argue that - although they have their detractors - Wesley and Pulaski were more interesting as characters than the four above, because they displayed more consistency of character (along with some major flaws). Ro Laran and Barclay also were much more compelling/well developed characters in some ways despite only being in eight and five episodes respectively.