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.
Thats the correct. Young adulthood.
Too young to be a real man, and too old to hang with the kids, but enough job money and time to afford any game you want and all the time to play it.