I used to like Chobits a lot more than I do now. The main problem I have with it, as has been discussed on certain TV tropes pages, is that it seems to completely change its meaning halfway through. Initially it seems to be a story about how computers and electronics are taking the place of real human interaction (the computers now look like people, and there was the whole thing with the teacher being dumped by her husband because he was more attracted to their persocom), but by the end it basicly seems to be saying "being in love with innanimate objects is perfectly ok and healthy". (yeah, persecoms aren;t technicly "innanimate" but you know what I mean). I mean, its made pretty clear that Chii *does not* have any special AI program or something that makes her unique. She falls in love with Hideki because thats how she was programmed, she's just an extremely advanced PC. And we're supposed to see Hideki reciproacting that "love" as the happy ending?? I will concur though that the manga is waaay better than the anime, which I found to be kinda boring. If I recall, they don't even start covering events past volume 2 till like after episode 13. Just too much filler. and THREE recap episodes O_O?
Thats the main problem that I think CLAMP animes have had, they have to add a bunch of filler to pad out the running time because with the exception, of Tsubasa (and RG Veda maybe), none of their series can really make a full lenght 26 episode season without padding. I actually like the CCS and MKR animes as a whole better than their manga counterparts ^^
Obviously I think the worst anime ever would have to be some horrible disgusting Hentai show that we can't even discuss here. Something like Cool Devices or La Blue Girl. But among the stuff I've actually seen there are a few I considered pretty bad.
Ah My Goddess TV show: I really couldn't get into the new TV series at all. I loved loved LOVED the original OVAs and the movie, but the TV series just didn't appeal to me. I think I mainly just didn't like having to start over fresh with the characters after I'd gotten so invested with what had happened over the OVA/movie series. Kind of like how it is with all those constant Tenchi reboots. Speaking of which...
Sasami Mahou Shoujo Club: ugh. The art and character designs were extremely ugly, the plot was too cutesy and boring, and worst of all it just didn;t feel like a Tenchi show. The previous Sasami spin-off, Magical Project S, at least managed to keep all the characters *in-character* and had the crazy Tenchi style humor and insanity to it. This felt as if they just took Tenchi characters and stuck them into the show in an attempt to possibly trick Tenchi fans into watching it. Didn;t even get any of the old voice actors back to play these characters. Plus I was bothered by a few episodes where the characters appeared to be praying to some kind of earth goddess. didn;t even bother with season 2
Demashitaa Powerpuff Girls Z: I nearly finished this show, I got to like episode 48, but then I just didn;t feel like downloading anymore. It actually wasn;t *that* bad, and had its fare share of pretty funny episodes. But it was just ultimately a pretty poor adaption of an extremely awesome american show, and hardly ever stepped beyond just being an average magical girl sailor moon rip-off.
Genocyber: This anime was so unbelievably gory and disgusting that I never made it past the first episode. It made me almsot physically sick, and thats coming from a guy who LOVED movies like Evil Dead and Peter Jackson's Brain Dead.
But I think possibly the worst anime I've ever seen may have been Colorful. I am ashamed to say that I bought it. It has no plot at all to speak of, and is basicly just a bunch of loosely connected shorts about various perverted guys trying to sneak looks at girls' panties or breasts. there were a *few* funny segments, but mostly it was just total pervision from beginning to end. Also, horrible music, ugly character designs, and eye catches that must have been created while on drugs.