I love to DM! I pretty much am always it. I still need to get out and be a player occasionally while I run my own game, but trying to improve continually as a DM/GM takes a bit off of that need. I also have difficulties finding a game that really challenges me or captures my imagination.
I played a one-shot last month and that was the first time I've played in years. I love DMing and worldbuilding, so I'm usually pretty content with the situation.