I can only honestly say GM because I put so much effort into being one and will happily go long periods GMing without being a player in any campaign, but have never gone long periods only playing but not GMing.
I also love to play and wish I had more time and opportunities to be a player.
I voted for GM/DM, but lately I've been really itching to be a player again. Getting somebody else in our group to step up and take over is going to be difficult methinks.
I've been almost exclusively a GM for the entirety of my TTRPG career, and I much prefer it. I count myself lucky that there are no players in my group who are both eager and able to run their own games, so I get to stay in the GM chair and run pretty much anything I want.
Been GMing for almost 40 years, and a dozen different systems. I am tired. I voted Player but finding a non DnD 5e game anywhere seem to be mission nearly impossible these days.
I think that I like being a player more, but has not happened outside of the local convention since 3e days. I enjoy being a DM, but my first instinct looking at the question was player.
I enjoy both but if I had the choice I would be the GM. Although I enjoy playing, I often find that I feel I don't have enough control over what happens. As the GM I have access to everything to make things more fun.