Some good Manga Suggestions :D

My suggestions are:

Tsubasa
Rave Master (Only for the fights XD)
Negima! (16+)
Gundam Seed/Destiny/Astray
Psycho Busters (Great Storyline)
Naruto Shippuden (Second Season?)
DNAngel (I just like it, no good reason)
Buso Renkin (Who doesn't like Alchemy? (Not an FMA ripoff))
Death Note

As you can see, its varied of sorts

I also hear that Fruits Basket is good, I never read it though.

would recommend Mahou sensei Negima most of all,

but other would be:
Love Hina
Naruto
Ranma
one pice
master detective conan
dears
Azumanga daioh
midori days
yotsuba&!

I recommend Fruits Basket! It's a must-read really. Also Fullmetal Alchemist is a good one, and DNAngel.

I forgot some!; Chobits, Naruto and High school Debut^^