Anime KAWAIII ;) (R - 1/2) is really old OLDDD, I think I read most of manga(s) during my middle school years (soneee)~
But hey, I think Azumanga Daioh, FLCL, and Abeno Bashi Mahou Shougentai are almost as good as R- 1/2... well ne ne ne how can I miss Chibi Maruko-chan!!! well, Dr. Slump (Japanese Manga only)...
eeee, R - 1/2 isn't the best anime out there... But I wonder Final Fantasy Anime failed (zanzen...)... Furthermore, there are way too many good ones, but don't forget about - Excel Saga (Anime & Comics), Macross Plus, Majo no Takkyuubin, Tenkuu no Shiro Rapyuta, Rupan Sansei: Terebi to Kariosutoro no Shiro... and more... follow by topic "R - 1/2," I find it little boring (sorry)!
Ask me I would love to recommend other Animes (New and Old)~