So, about me, been playing for 11-12 years, started out GMing and probably on the whole find that the more rewarding part of the hobby, but I enjoy playing as well. Played quite a range of systems by this point; did my mandatory few years of D&D and Pathfinder, actually started with Dark Heresy. But I've run Shadowrun briefly, Mutants and Masterminds, dipped my toes in World of Darkness.
I think a benefit of my time behind the screen is that I'm relatively flexible in what I enjoy. I can go for deep and character driven games, but I also appreciate the fun of a good dungeoncrawl or epic combat. I'm absolutely a sucker for intrigue, but I'm not above playing characters dumb as a brick. I'm perhaps overly comfortable playing morally grey grand bastards, but when I think of my favourite recent characters, the Lawful Good Rogue probably ranks as the most compelling.
I'll admit, though I'm by no means someone who can only enjoy hyper-simulationist games, I do occasionally tend to press up against overly artificial system restrictions. In Starfinder, my character did over time trend towards 'why don't we vent the airlock before we go in... soften them up.', and in general, I see a balanced encounter and will often think 'how can rig the deck a bit more in my favour'. Also not a big fan of 'Narrative' games, like Powered by the Apocalypse. For whatever reason, they are the one genre I've never quite meshed with.
But yeah, I am generally open to try different systems, and flexible about my exact role in whatever party I join.