I'm looking for a few suggestions on any good Манга series I could check out and hopefully like, according to the genres I'm interested in. Any ideas?

First off, I Любовь Rumiko Takahashi. I completed Ranma 1/2 (best series I'v read so far), InuYasha (Ranma was better ;D), and are in the process of Чтение Urusei Yatsura (also very good) and Maison Ikkoku (cute ^-^). I'v heard about Rumiko's new series that she's Письмо called Rin-ne and took a look at it, but didn't quite get hooked so far like I did with past works by her.

Yes, I'v read other Манга series', and just to name a few: Lovely Complex (loved), Wedding Peach (Meh... cute...), and Azumanga Daioh (though I'v yet to find еще volumes).

The genres I'm interested in are:
Comedy
Romance
Action (must have comedy and или romance also)
Fantasy
Sci-fi (must have comedy and или romance also)
School Life
Slice of Life
Shounen
Gender-Bender

Any ideas so far?
I'v heard about Fruits Basket, Ouran High School Host Club and Vampire Knight, so don't even try with me on those.

I really like the classics, FYI. But I'm up for just about anything that fits. :)