Did that last year and enjoyed it. I'm now making my second attempt at Star Trek: Deep Space 9. I never got into it when it was first on, and stopped watching after a while (didn't help that the TV channel showing it kept changing the time slot and it was late at night as well). I'm still not that into it but I've at least made it to season 3 this time. I know a lot of people tout it as one of the best of the Trek franchise but I'm not seeing it myself (and for a show based on a space station I always prefered Babylon 5, which I also rewatched recently).
Also finished rewatch of original Star Trek. It's kind of fashionable for people to rag on it for various reasons, myself included, but I'd forgotten how good it actually was, particularly the first season. Yes, it went downhill in S3 and the small budget became very obvious, but overall it rekindled my love of original Trek.