A big chunk of that was my personal health woes, which are what they are and have nothing to do with the game. Since those have eased up, it's not surprising that I'd enjoy the game more than I was before. But what's come to my attention is how much of that "not having fun" had nothing to do with the game itself, nor my personal situation, but one person. One person in my guild made the game not fun for me. What's really amazing is, I only figured this out once that person wasn't around to ruin my good time.
Daily quests? I've been doing them like gangbusters this week - to the point where, on some days I actually had to go back to Cataclysm content because I ran out of dailies to do. Heroic dungeons? Yup. Scenarios? Double yup. Raids? Been in the thick of 'em, and even increased my performance. Leveling alts? Yes I have. The only thing I haven't done is LFR, and that's because I don't need anything from it. I even hit up Sha of Anger, and I haven't looked at that guy in 2013.