I'm not into Bleach for good writing. I like the character designs and the action sequences are pretty awesome. The current (and final) arc actually looks like the writing is stepping up a bit and good guys are actually dying, so I think it's a bit ridiculous that they went on a possibly permanent hiatus right when the final arc started. The fullbring arc contributed nothing but a slightly cooler design for Ichigo and was an embarrassment to end on.
As for One Piece, Zoro is easily my favorite character. Watching him straight destroy Mr. 1 when pushed to the brink of death was absolutely awesome. Luffy's fight with Crocodile wasn't as epic as I was led to believe but I don't really like Luffy's ability to begin with. Swordsmen are always the shit, though. As for remembering individual characters, that's already how my mind works so I'm good there. I have some pretty good ideas about people that will pop up again. Coby is gonna be huge, no question, and will likely have to fight Luffy. No spoilers, please, but I figure that's a no-brainer.
Since this is the new topic, I figured I'd drop some of my other faves in here: Blood+ was excellent, Death Note....well, the first half was good, Neon Genesis Evangelion is epic (when watched with the End of Evangelion) and I'm pumped for the third and fourth Rebuild movies, Kiba was alright but kinda faltered towards the end, and my favorite anime movie of all time is Street Fighter II: The Animated Movie. On that last one, the English dub and completely new soundtrack makes for it being the only anime, movie or series, that I prefer in English besides DBZ (again, the music is why). Watch the final fight in Japanese and you'll see what I mean; feels completely different.