There are pros and cons for either demographic: whilst being older may be ideal since not only you bypass age restrictions, you also have the capability on purchasing it with your own money without having to ask parents for that given that you have employment and recurring income. Gaming as a kid gives more time without having to dwell much on responsibilities that adults have to worry about but at the same time are held by school.
That’s hard for me to answer. I have more fun now than I did as a kid, but the games are different.
When I was a kid, Simcity 2000 with 256 color VGA graphics was the cutting edge.
Now in this future space year of 2026, there are factory games, RPG’s with full voice acting and character animations, games where you can work on cars or farm crops or check paperwork. There are point and click games that work like Monkey Island, only they’re pornographic. Instead of monsters in Doom falling in a sprite of chunks, I can see them chainsawed apart or curb stomped. I can build rockets whether they work or not. I can be a robot driving a boat, powering up old infrastructure and scrapping junk to build machines, when I’m not dodging sharks with freakin’ lasers on their heads.
Tl;Dr: Its hard for me to tell if I am having more fun gaming as an adult, or the games are just better now.