I do love Red Dwarf but it definitely needs an asterisk in terms of calling it a fave.
s1 is very hit and miss.
s2-s5 is pretty much peak comedy sitcom with only the rare mistep.
s6 the break between s5 and losing half of the gestalt writing entity did some damage. There is one of the best episodes period in there with a making of clip out there that makes it even better. Generally my advice for the longest time was to watch the first season then stop in the sixth before the last episode. Yes you miss a truly excellent Rimmer moment, and some fun dimension shenanigans which Lower Decks definitely cribbed some notes from for their own series finale.
s7-8 are mostly bad with one of the very worst episodes to ever disgrace the show in Duct Soup. Couple of solid eps like the JFK one, and yes that song is amazing, but I was of the opinion that Red Dwarf was dead, and the corpse was starting to get properly rank.
Back to Earth is alright. Couple of fun riffs on Blade Runner, and some amusing meta stuff about Craig Charles' career outside of the show but it didn't do enough to justify it's existence to me.
s10 to my absolute disbelief is kinda solid with one genuinely stand out, yes this is a great episode of Red Dwarf. I genuinely had to change my point of view that nothing past s6 had been worth it. Really was bloody lovely to be proven so wrong.
s11 though and onwards, I just couldn't do it anymore. Bless 'em, but these guys playing their characters are so old at this point I was getting down watching them trying to salvage the tired material, and the first episodes of that season I watched weren't enough to convince me to stick around. I'm happy they're still getting paid though and that they're still going as it's a show that has such a special place in my heart. Red Dwarf genuinely was the formative sci-fi as a child for me that Star Wars or Star Trek was to so many others. I didn't see my first episode of Trek until I was 17, and Star Wars I had no real love for outside of thinking that New Hope was pretty good, but Red Dwarf I watched and rewatched over and over. Read all the books, thought the book written by the guy who left was better than the one who stayed while also thinking those two books showed why the show was best when they were working together, and even used to read the fan magazine. Really I wish I had kept that, and also knew about polybagging to preserve them, as the comic sequel they did to Polymorph was significantly better than the one they did later in the show during season 7.