TNG, DS9 and even VOY to some extent are the ones I've rewatched the most, as they're the ones I grew up with. I've watched ENT twice, and plan to rewatch DIS at some point.
A lot of TOS, I've seen a few times, but the majority of season three, just the once. I gave up watching TAS about a halfway into it. There was some good stuff there, but not enough to get me to come back.
I've seen all of the films, far too many times. Even the bad ones.
TOS was my first entry into the franchise. Used to watch it with my father sometimes when it was on Sunday afternoons.
A lot of TOS, I've seen a few times, but the majority of season three, just the once. I gave up watching TAS about a halfway into it. There was some good stuff there, but not enough to get me to come back.
I've seen all of the films, far too many times. Even the bad ones.

TOS was my first entry into the franchise. Used to watch it with my father sometimes when it was on Sunday afternoons.
