I do prefer Bleach much more...I think it's the idea of Shinigami, and different "realms." I also like swords. They're purty ^^
And I like the characters better. I mean, Naruto's funny, but....I dunno, I just like Bleach characters better. And Rukia's in Bleach. Rukia is awesome. XD
Naruto is far more enjoyable, and exciting than Bleach(imo) because: you can read the manga and and watch the anime with the same fun. Naruto has less filler if you skip the ones before Shippuuden. Kishimoto Masashi, thought well 'far into' the story before actually releasing the manga, and therefor it's sometimes surprising and really clever, that's what I think when I read the manga. I think the manga for Bleach is much more fun, and that's what keeps me bored when I watch the episodes, but it's still great, sometimes, it's really funny on parts, especially now, the voices for Nel, Pesche and Dondochakka. They are both great anime/manga, but Naruto wins in mostly everything in my opinion.