Yu Yu Hakusho is definitely a good one.
I'd rate even Naruto over one piece, and I don't like Naruto.
Never got to watch Sgt Frog but the manga was pretty entertaining.
Didn't get to watch much of Witch Hunter Robin but it started off alright, but still came off as overdramatic and trying to be clever by being abstract and over-complicating things. Same goes for Wolf's Rain.
I really enjoyed G Gundam. Good blend of fighting action and drama, it wasn't as overserious as most the gundam series can be. If you're smart like me, you'll watch it and keep in mind that Master Asia is the former king of hearts, and that damn well says something important about his character.
Neon Genesis Evangelion- hard to describe how I feel about it. The series is kinda vague and abstract in a very japanese sort of way and it's easy to get lost as to wtf they are talking about and how the hell are they jumping to these random conclusions. Oh, and you'll learn to hate the main character, Shinji. But it's kinda classic and unique, so I recommend you watch it anyways.
Princess Mononoke and Spirited away are pretty good.
I can see how SAO could get some of its hate. It started off awesome, then just stopped focusing on any action/battles for like forever and it's annoying when the main character is that anti-social and you feel like you'd have done so many things differently if you had been in the same situations- like kicked more ass, been more involved, and not some mopey wanderer who manages to maintain a top rank/level despite spending so much time going back to the first area and traveling back up the levels. But still, once he was finally forced to interact with people, he stopped being an inconsiderate loner and became a much more likeable character.