Re: Chobits- Persocoms, anyone?
Chobits
is seinen, it was published in Young Magazine, which is most definitely aimed at males.
But I think Chobits is by far CLAMP's best attempt at shounen/seinen, mostly for the reason that it still has so much shoujo influence in there (it's easy to see why people would think it was shoujo). Although it's quite fanservicey, it's very prettily drawn and deals much more with emotions than most other series of that kind, which is what makes it so great. The last couple of volumes brought me close to tears. xD
So ye, Chobits is very good. I still think a few of their actual shoujo series are better though... Sakura and Tokyo Babylon are anyway, and maybe X. (Ah, the good old days when CLAMP did good stuff... >_>;.)