I love the original series, Next Generation, and Voyager. I never really liked Deep Space Nine, I've only seen the second and seventh seasons, but that was enough. It didn't have enough exploration for me. Enterprise was pretty good, until the 3rd season. The whole Xindi plot thing was cool, but it wasn't executed in what I thought was a star trek like way. It seemed to me that they didn't try to use diplomatic means to stop the Xindi in the first place, which seemed very....unusual, for Star Trek. I remember through that entire season thinking, "this doesn't feel like Star Trek at all" (ironically, it was the first season where the show was offically renamed to Star Trek: Enterprise). I have only seen a few episodes of the forth season, but from what I've heard, it wasn't all that bad.