I actually only truly and seriously love two k-pop groups:

Block B: The first group in k-pop I ever actually became a true fan of, like enough to push myself to know each of the members' names. I watched a ton of Block B-related stuff including interviews and variety...just whatever I could access. Their music has always been addictive and the members are hilarious. After what they've been through and despite the controversies, I respect them so much. I wasn't into the 'Yesterday' comeback at all, but I'm still looking forward to another group comeback!

EXO: First, the EXO brand itself drew me into them; the style of each comeback, the multiple creative uses of the logo, the overall image the group represented. So, honestly, that came first before the music/MVs/dances. I got into EXO at a time when life started becoming an uphill battle for me, so subsequently I found myself getting more excited each time whenever there was a new comeback or song, or even a random CF (Goobne Chicken etc). By the way, these guys are super talented and I don't care what anyone else says. Of course not all of them are singers, or rappers, or dancers, but each member has their own strengths and they are all talented in their own way, so there.