Hajime no Ippo: I'm not the kind of person who cares about unknown anime, so I didn't think I would like this, especially after hearing it was about sports. I regret thinking that way. The style it was drawn in was/is really great, and the show had a lot of character development with plenty of hilarious moments. I can't even remember watching a filler that made me lost hope for the show. It's amazing, and it's still going strong with over 800 chapters, showing no hint at an ending any time soon.
Gantz:Granted, it was only a few episodes long, but it was great. Quite possibly the coolest anime since it features lots of blood, nudity, and gore, while still keeping the story interesting.
Aokie Densetsu Shoot!: Or however it's spelled. Basically like Hajime no Ippo, but with association football instead of boxing. They have a great plot twist right in the middle of the story, which is always a good thing.
Now for the wall of shame.
Naruto: I don't see what people like about it. The battles are lame and way too drawn out, and they put fillers all over the place, most of which have little to no character development, and has no point for anything other than entertainment. Oh, and they're ninjas. It isn't the fact that it's way too cliche, but what bothers me is that they aren't ninja like at all. When you think of ninjas, at the very least you think of something like
this, just with smaller weapons and sleeves. Since when was a blond ninja in an orange jumpsuit stealthy at all? Thankfully, it looks like they plan to end it soon, seeing as how that godforsaken sequel seems to be nearing its end.
Bleach: Just no. The idea wasn't the most overused, but it still has the most drawn out battles of all time. The anime could've done without Hueco Mundo and ended it's life before it passed its prime, but they just had to ruin it. The battles are absurd(seriously, they barely live against one enemy at one time but get a huge burst of power just a few days later. This isn't Dragon Ball.) and drawn out, if I didn't already say that. The Hueco Mundo arc isn't finished because for every one episode there, they seem to have 10 filler episodes. I don't see why they had to do it at the worst time for flashbacks. Why couldn't they do it at a time that made sense? Oh, right. They're fillers.
To Love-Ru: Honestly, it's quite terrible. I only watched it for the cheap laughs they gave, and that's all. It's plagued by innuendo and awkward moments, which is good when used in moderation, but the overuse of it just made me have a bad taste in my mouth afterwards.
I know a few others, but I can't be bothered to remember their names.