Watched Supernatural for 6 seasons but in my opinion it had too many filler/monster of the week episodes which are just okayish in contrast to maybe 4 really good episodes per season

i also watched 13 1/2 seasons of NCIS and 4 of NCIS:LA. stopped the first one because Tony (Michael Weatherly) left and I already knew Abby (Pauley Perrette) would also leave. I have no idea why I stopped LA but then I dont know why I started it in the first place

the walking dead took me 4 seasons to quit, after i only liked the first season