If you could decide what age you were able to be, maybe even for as long as you are alive or breathing, how old would you choose to be and why?

I would be 18 b/c here in the US you usually are graduating or just have and so you basically get to begin your life over agian and have a clean slate if you want. It's a good time in my opinion and you get to vote, get tattoos, live on your own, etc.