I personally loved my own highschool's uniform so much that animanga uniform seemed dull to my eye!!

BUT if I had to mention a few, I cannot deny that Haruhi Suzumiya's uniform is TOO recognizable (and perhaps the trademark of anime school uniforms). Another one would be Code Geass's ! They're very recognizable too despite the series not exactly focusing on the school itself...

I don't really know what else to say.... but oh !! I really really like school sports uniforms in animanga!! Inazuma Eleven has really really nice designs!