i've always loved the singles so much... i think "Sorezore no One way" by Koyomi is the best one tbhh! I love Yomi :)
Also Kaorin's "Kaze no Mon-Ami" is groovy as hell.. actually maybe i like all of them equally..?
whats your favorite song?
BTW- i have all of the azumanga single files, if anyone's interested!