I kinda wish Star Trek the next generation TV series lasted longer. for me this was the best of all the star trek TV series.
I wish Dragon ball GT lasted longer. it was kinda sad to see one of my favorite anime series end.
Transformers generation one cartoon. I wish would have gone on longer. it would have been cool to see hasbro's vision of powermasters,pretenders,micromasters & action masters. yes i'm aware takara did headmasters,masterforce,victory & zone.
Gilligans Island,I wish had more episodes. the show feels like it only has under 50 episodes. I've seen every episode literally a dozen times.
The honey mooners in another show that I wish lasted longer. another great show that feels like it only has under 20 epiodes.