I started at age 7. I'm 34 now. Still learning, and still feeling like a noob. Can't get enough of this, though.
I know this sounds like a "lel Lisp is superior to your blub lang" but it's more of a "I actually went past procedural programming and stupid OO with Lisp and it felt like I finally actually knew something about the stuff I did".
Dunno why I'm typing this out though, oh what the heck, posting it anyway.