What about Yuri? XD
As far as those particular series goes, they're not the best IMO, but they are certainly good enough to enterain me, if you're also easily amused you'll like them.
I HIGHLY recommend Bitter Virgin, the story is exceptional, flawless. The reallife situations that happen in the story do happen, but never spoken about, usually. It will leave a huge impression on how you see life in general.
Another is Kodomo no Jikan (ONLY if you don't mind a more than averge loli-themed story). It is VERY mature, NO NUDITY! This manga is my all time favorite out there. Without going into details, this manga has me antiously awaiting the second season of the anime, to be out this coming year in January (Announced at least for then).
A more action Manga to satiate male, and some female, hormones would be Samurai Deeper Kyo. This manga is another great one that FAR outstripes the anime counterpart. a Must read for every avid manga fan.
Lastly GeGeGe no Kitarō is a MUST READ for EVERYONE who reads manga. It cannot be expressed why you should read this one, but you must. Trust me, you will never regret this choice.