So far so good for me. I switched last week after dual booting Pop OS and Windows 10 for a few months. I used to use Mac OS X back in college and missed the interface, so Pop OS’s implementation of GNOME felt good.
As for OP’s question, someone else with more knowledge can answer if a specific distro has the best drivers/compatibility with games. Pop OS comes with NVIDIA drivers which works for me.
I also wanted a full desktop OS. Some of the distros will focus on being a controller-friendly frontend for gaming rather than a desktop OS.
It might be helpful to try something like Ventoy for any distros that support a live CD. You won’t be able to fully test gaming performance, but Ventoy lets you try multiple distros on one disk.
Other questions for OP: What type of GPU are you using? What is your current OS?
If Civ 7 reviews well and works on Steam Deck, I’ll be tempted.
I’ve been a patient gamer since buying used NES games as a little kid, but I’ll buy at launch every once in a way. I was a single adult with a full-time job when Mario Maker came out. I took a day off work just to play it nonstop. It was a childhood dream of mine to design and play my own levels and spent my teenage years making ROM hacks with Lunar Magic.
I still think about how great that day was, staying home all day to play. Sometimes it’s nice to treat yourself.