K-Pop and J-Pop fan here
The J-Pop I enjoy most these days is Perfume, Kyary, and WORLD ORDER. Perfume's probably my favorite of the three (Edge and Fake It and Spending All My Time, oh my!). I only enjoy some of Kyary's songs such as Invader Invader, while the others are too odd for my taste or her voice doesn't work for me. WORLD ORDER is just cool, relaxing electronic music with synchronized dancing, and although they haven't released much as yet, I really love Permanent Revolution and Mind Shift.
In terms of K-Pop, I'm not the biggest fan you could find, but I do love SNSD, with my biases being Sooyoung, Hyoyeon, Seohyun, and Sunny (in that order). Still not sure whether I prefer their Korean or Japanese releases, but my favorite songs would probably be Trick, Time Machine, Look At Me, Flower Power, and Animal. (TaeTiSeo is also awesome!) I also like some of Crayon Pop's songs, and the boy bands are pretty fun sometimes, though I've never found a group to particularly fangirl over.
Sorry to interrupt the current conversation xD
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My Friend Safari is Ghost with Shuppet, Pumpkaboo, and Spiritomb.