JPOP that i like, and looking for recommendations..

i like a little bit of JPOP, but it seems i'm picky about it in some way i can't figure out -.-" here's a link containing the ones i like..

Spoiler: download

finally up!(click me for download :P )

i named them to the best of my ability -.-" so listen to them, tell me what i might like, and post your favorites >.<

My favorite: YUI, Utada Hikaru, Shiina Ringo, Tokyo Jihen and Angela Aki.