I've never actually liked love triangles. Why would I like that level of uncertainty in a show that I came to see a romance in? Love triangles aren't romance, they are lame. I suppose I tolerated them as a necessary evil in all K-dramas, but there are different types of love triangles.
The kind that is most tolerable for me is the one where even though there is a second male lead, you know that he never really had a chance and that he really isn't an issue, but is a bit annoying or makes the male lead actually act instead of being a scaredy cat bum or whatever. The type I hate the most is the one who for some reason gets way too much screen time and makes the love story plot weak and disconnected. I'm all about a reasonable build and flow that makes sense and allows me to build the right kind of feels instead of last minute forcing them down my throat. Does this make it a little formulaic? Maybe, but at least I am seeing the romance I want blossoming.