If eating out more is a sign of maturity, I am still in the womb.
OH MAN I get so annoyed (possibly unfairly) with people over the age of 20 who can't cook anything for themselves. Not everybody has to be a gourmet chef, but I feel like once you are a grown-ass man or lady you should be able to function without somebody else making the bulk of your meals for you.
This relates to, and might actually stem from, the fact that through several serving-type jobs I have encountered multiple dudes in their forties/fifties who described themselves as "picky eaters" or refused to touch any kind of salad or vegetable that came with their food. You are an adult, not a six-year-old; unless it is going to make you violently ill or eating it is against your religion or something,
eat what is put in front of you. All that said, last week at a party a dude gave me a 15-minute-long lecture about how when I'm 26, like he is, I'll look back on myself at 20 and realize how childish I was and how little I really knew back then. Because by 26 you've pretty much acquired all the knowledge and wisdom you're ever going to need. So check back with me in six years, I guess?