Well I can't call myself a generic stable person: I get mood changes all the time and I do get psychotic from time to time, especially when I'm having fun.
Sure, sometimes I feel like I'm only 5 years old.
But that's only in relaxation.
Most of the times, it's just a cold calculative state in which every move is planned. Which is no wonder, why my psych. age is far older then my actual.