I used to play a ton, would suffer in RL to make raid days/hours, etc. Pretty "hardcore" guild I guess, now the top guild on the server for raiding, with a couple Grand Marshals (Maydie is in my guild, he actually has two Grand Marshals now).
Halfway through Naxx I just burnt out- I rolled horde on a different server and just pvp now with RL friends. Its more relaxing, less time-demanding, though probably just as time consuming. Its just that during raids you're pretty much committed for 5 solid hours. For pvp, I can always sit out a game or two, log in when i feel like, log out when i feel like, take dinner breaks, etc. Starting to feel bored though... lvl 39, exalted with WSG, revered with AB, and i'm at the honor cap for the level (44.31% rank 5). Have to wait for some friends to level up to 39 and mess around some before we can move on though -_-.
Edit: holy crap someone take this game away from me.