Bolded groups are those that have disbanded.
 

In alphabetical order:

1. 2NE1 (FOURever) + Park Bom (my ultimate ultimate bias)
2. 2PM + Nichkhun, Wooyoung
3. 4minute + Jiyoon, Jihyun
4. After School/Orange Caramel + Nana, UEE
5. AOA + Hyejeong, Chanmi
6. Apink + Bomi, Eunji
7. Beast/Highlight + Gikwang
8. Big Bang + T.O.P.
9. BTS + RM, Suga
10. Brown Eyed Girls + JeA
11. CNBlue + Minhyuk, Jungshin
12. DBSK/TVXQ + Changmin
13. Dynamic Duo + Gaeko
14. Epik High + Tablo
15. EXID + LE, Solji
16. EXO + Lay
17. f(x) + Amber, Krystal
18. Leessang + Gary
19. Mamamoo + Moonbyul
20. MFBTY + Yoon Mi Rae
21. Rhythm Power + BoiB
22. Shinee + Onew
23. Shinhwa + Eric
24. SISTAR + Soyou
25. Super Junior + Shindong, Yesung, Donghae, Heechul
26. ZE:A + Kwanghee, Dongjun
     

Other artists I love include:

1. Baek Ji Young
2. BoA
3. Cheetah
4. Dami Im (SHE'S KOREAN BUT AUSTRALIAN AND SHE'S AMAZING)
5. Dok2
6. Gray
7. Gummy
8. Iron
9. IU
10. Jay Park
11. Jessi
12. Jung In
13. Mad Clown
14. Masta Wu
15. Microdot
16. MyunDo
17. Psy
18. Simon Dominic

I'm sure I'll come to appreciate more groups and artists as my love for Kpop increases, but this is it for now. JFYI, I'll update this list as time goes by, creating new blog posts instead of editing this one...Unless my biases change for these groups I've already listed XD

EDIT: I've decided to just make one post of artists/groups. It's too complicated to make multiple when one would suffice ^^

I'm sure, by the time I'm old and wrinkly, I'll have written a fic about every single one of these groups/people. So let's get it :P