This is kind of what I meant. One day after watching some TNG and DS9, I noticed a few things:
By the end of the series and in Nemesis, characters like Geordi, Beverly, for example, are almost exactly the same people living the same life as they started out. No marriages, relationships, career changes, moves, etc. Just the same people, filling out the background.
In contrast, in DS9 a character like Damar started out as a simple adoring assistant to Gul Dukat, and a big jerk. It started out as a small almost forgettable spot.
He was a super nationalistic, all for Cardassia conquering the Alpha quadrant ect. He then was made the puppet leader of Cardassia, then he turned against them when he saw what they were all about, and became a ragged underground freedom fighter working with the Federation. At the end of the series he was killed fighting to free Cardassia.
It was complete 180 degree turnaround that actually made people like this guy. (And you wonder when you've seen the things he's done if you're supposed). But all it depended on the events in the previous episodes that made him this way.