You and me both. I really like them all but I preferred -M a little more so when those two left I was like, oh no this could be bad. I still have to check it out though.
I started from when 2PM and SHINee first debuted, with 2PM being an early favorite. Then I was into CN Blue, Beast, After School, Brown Eyed Girls, Infinite, U-Kiss, the list kind of goes on haha. But I will say that 2PM and EXO are the ones that I'm too deep into; once you look for fanfiction that seals it.