I just see it the other way, the Federation has such a rich and complex history and foundation, there's so much interesting things worth exploring there. You're not tying yourself down at all.
As far as not personally being interested, if it's not your thing fine, but if people want to write something off because it's not what they were expecting (i.e., i'd be interested in this concept if it didn't have the words Star Trek in front of it) that's just sad because who knows what you're missing out on. Say what you want about where DS9 fits into the bigger ST picture, but it was a good show and at times a great show. People who skipped it simply because it was different than what had come before missed out on some great stuff. It would have been really sad if the show had never been made because someone said this isn't what we expect from Star Trek