I've been kind of working at learning little by little over the last three years...haven't gotten very far because I haven't seriously been studying the language, but I can at least understand general meanings when I watch things without subs and that's kind of nice :)
I find it really neat how now that I'm so used to hangul characters, they don't even look like hangul to me anymore, if that makes sense! I mean I can look at Korean words in hangul and it's almost as if I'm seeing them in the roman alphabet, like I can see the sounds each character makes??? I don't know??? Either way I always forget that other people I know can't do the same, so it's kind of funny how I'll read something off and people that don't know I can read Korean will ask, "how do you know what that says?" And I'm like, "isn't it obvious what it says?" And nope, no it isn't. Haha.
Anyway I definitely find it's really helpful to watch movies, dramas, reality shows, etc., and listen to music and stuff in Korean because it helps to practice what you know, and matching up recurring words that you hear to words you obviously recognize in the subtitles helps to drill meanings into your head :) But that's sort of a trick to learning that everybody already knows.