I used to read manga a lot but I've kind of slowed down a bit. Here are the ones that I enjoyed:
Hana Kimi - (My favorite, I read and own all 23 volumes of them!)
Death Note - (Textfest but very intrigiguing. I got till vol. 12 or so lol)
MARS - (Kind of heavy but still a really good read)
Fruits Basket - (I read up till about vol. 20ish and then started losing interest)
Inuyasha - (I read up till around vol. 30 and then stopped XD)
I have a couple volumes of:
Love HinaDNAngelFull Metal AlchemistBut they were a little juvenile and couldn't keep my attention >.< (not saying they're bad, just not my taste

)