My problem with anime is repetitive styles and generic plots and characters. Every girl is a sex object regardless of age and someone has to have zany hair and a stupid personality, also having a "pervert" character has proven to be a staple in many comedy animes. Not to mention far too many animes have hundreds of episodes but very little going on in each one. Dragonball Z is a prime example. "What's that, you wanted to see the full battle? Well that's just gonna take 10 fucking episodes so make sure to tune in next time on-" You get the point.
Not all Anime is bad or very generic, just a shit ton of it, especially compared to western animation. Anyone remember "Bonkers" or Darkwing Duck? How about Hey! Arnold or Doug? Gargoyles was a cooler, more dramatic show for kids. Each one has a unique style and characters, its what makes those shows worth re-watching. Now I still like a few animes, I enjoyed Full Metal Alchemist and the first couple arcs of Bleach (after Rukia was saved it really really went down hill with so much filler and typical anime bullshit).