I used to think that way but then I changed. I decided that I will look good at any age and will work hard to look good and be a sexy daddy.
I also examined the pros and stuff and being 30 is actually good because you got a steady stable job, you got coins to spend on trips and spoiling yourself and family, your more independent and ppl take you and your opinions more seriously etc etc : ) my only true fear of aging is knowing that my parents will eventually die
But seriously, I get the best of both worlds. When I'm clean shaven I look really young (like early 20's) but I can let my facial hair grow and become a total daddy.
I guess the only thing I fear is being on medication perpetually, but I still have a good 20-30 years before that actually happens... I hope.