I pretty much like most K-Pop bands but my top ones are definitely: 1. BIGBANG 2. SISTAR 3. B1A4 / Wonder Girls (tied for third - I can't choose) My favourite solo artists are K.Will and IU at the moment, and the non mainstream bands I like are CNBLUE and Nell. There are loads more but that would just consist of me listing most of the Korean bands out there and that would be a lot of text.
groups and artists which I like are not so popular in kpop like others and most of them are old bands : N.E.X.T , Boohwal, Tree Bicycle, Loveholic, YB, A-treez, The Black Skirts , Busker Busker, Norazo, CN Blue, Mad Soul Child, SG Wannabe, M to M , The One << Thats what I'm usually listening. (I'm glad if anyone here likes them too)

But I have my favorites in our colorfull kpop :D : CN Blue, Big Bang, LEDApple , Lunafly, Shinee, Brown Eyed Girls,Ailee, K.will...
My favourite boy group is Infinite, they're always at the very top for me. Big Bang are second. They were my first idol group. My favourite girl group... I love girl groups so much. Kara are my favourite, and then there's Rainbow, After School, 4minute, and 2NE1. I also love B.A.P, NU'EST, A-Pink, Girl's Day, Shinee (not most of their post-Sherlock releases though...) and SNSD.
The lovely B2ST ^^
I like too maaany K-Pop Groups... SNSD, SECRET, APink, Hello Venus', EXO, INFINITE, Teen Top & etc. :D
SHINee, EXO, Girls Generation, 2NE1, Big Bang, 2pm, 2am, Fx, A Pink, Infinite, Ukiss, Teen Top, MBLAQ, tvxq, 4Men, G.NA, B2ST, CNBLUE, FT Island, SS501, SE7EN, Super Junior, Super Junior-M, December, B.A.P, Boyfriend, B1A4, BoA, 4Minute, Girls' Day, SISTAR, Miss A, F.CUZ, K.Will, John Park, NU'EST, T-ARA, ZE:A, 100%, CROSS GENE, Rainbow, Ailee, LEDApple, IU.
SHINee, B.A.P., Block, JYJ, 2PM, 2AM, BIG BANG, CN Blue, F.T. Island, C Clown, Led Apple, Super Junior, Nu'est, f(x), SNSD, Teen Top, Miss A, EXO, Dalmatian, Sistar, Girls Day, B1A4, Jay Park, Boa, U-Kiss, Infinite, Se7en, Epik High, 2NE1, Super Junior M, MBLAQ, Henry, Beast, and many many more! :3 i love K-pop <3 ^^
SHINee and Infinite
INFINITE!!!! <3 They are the first!!! <3 Then I like FT Island, 2PM, BTS, Boyfriend, B2ST, C-Clown, BAP, B1A4, A-JAX. And about girls I like Girl's Day!!! <3 And also Sistar and miss A. And as solists Ailee, Seo In Guk and Jay Park. But I listen to almost every K-POP artist...I really like K-POP!!! <3
Mine is Infinite, Shinee, Cn blue, mblaq, vixx and other more
It has to be JYJ for me (first kpop group I listened to (when they were in dbsk) and first kpop group I've seen live, first kpop crush so yeah) then it would have to be U-kiss because I love them to bits and I've seen them live twice, and the last time I actually got to interact with them and they are so nice. When it comes to bands, CNBlue wins. I like a lot of groups though.
Supernova, SS501, M.I.B, U-KISS, DBSK, Wonder Boyz
Bigbang, exo, ftisland, cnblue.