Pffft, I always assumed that I would have it all sorted by 25. And that I would own a house. I turn 20 next month, I just moved back in with my parents after a disastrous year out of home and I still have no sense of responsibility or committment to anything. That could all change, maybe I'll be that person I wanted to be at 25, but somehow I don't see it happening. Hell, in my life plan, I'd be halfway through my degree by now. I just dropped out. I always just assumed things would happen and never considered the idea of having to work for them cos I've been lucky enough to have things given to me or have them fall into my lap.
Anyway - I don't know when I'm going to act my age, but I kind of hope it's soon.