Stranger Things should have been a one and done miniseries.
Jurassic Park - the first one is a perfect movie, while all the sequels are pretty much worthless. Never saw Fallen Kingdom.
Community should have ended with season 3 (after that it has its moments but the severe patchiness of later seasons and the existence of season 4 makes it a very hard show to recommend unreservedly. The season 3 finale also acts as a pretty good, if abrupt, ending to the show as a whole)
In total agreement about Star Wars - it took me until The Last Jedi to realise that I haven't actually truly enjoyed any of these films since Return of the Jedi and I was only going to see them because of nostalgia and successful marketing.
The Simpsons season 8-10 (take your pick, though if I could have it my way, season 8's 'Homer's Enemy' would have been the finale to the TV show, with any further Simpson adventures being released as theatrical movies.
The Dark Knight Returns (comic series) should have ended with the first one.
Modern Family - first 2 seasons were marvelous, then it immediately dropped off a cliff.
Parks and Rec is one of the great modern sitcoms, but I could have done without that bizarro, tacked-on final season. The whole thing reeks of a last minute season order when they thought they'd been cancelled.
Friends - say what you want about the show, but there's an undeniable drop in the quality of the writing after season 5, and the characters become increasingly Flanderised from that point out. I have a great nostalgic fondness for the early seasons, whereas the latter half of them feel like a different show.
Sex & the City - again, I'm sure there are a lot of haters, but the TV show is solid - great, even. Dated, yes, but what isn't? It's the spin off films that suck - they are like a dumbed down cartoon parody version of what people think the TV show is. The second movie especially is absolutely excruciating.
