I like all the Star Trek shows up until Enterprise, that show was just ok. New Star Trek? I watched like 3 episodes and won't bother trying after that. The first 2 "new" movies they did were pretty good, but seems like it all falls apart after that.
I have quite an impressive collection of old classic TV shows, though, particularly westerns. I absolutely LOVE Rawhide, Maverick, and Cheyenne, probably the 3 best western TV shows ever made. I've got 'em all though, including but not limited to - Wanted Dead or Alive, The High Chaparral, Bronco, Sugarfoot, Bat Masterson, Bonanza, Gunsmoke, Tales of Wells Fargo, The Rifleman, Laramie, Branded, F-Troop, the list goes on and on.
The only show I've been trying to get my hands on for years now, and is quite elusive to find - is Death Valley Days. I truly liked Death Valley Days especially because it was based on true stories, old stories that have long been forgotten over time. It seems they tried to bury this show with the rest of history, lately. You can find literally any of the other shows I mentioned above on DVD/Bluray or even some streaming services, but Death Valley Days remains untouched. Can't find it anywhere, not even on torrent or bootleg. I'd pay rather well for a complete DVD collection of Death Valley Days if I could ever find it.