[Toenex]

For a start-up it's not age that matters but risk aversion. You need to be happy/able to take on the risks, which are mainly financial. However, there will typically be a relationship between age and risk with the most risk averse period in your 30's and 40's when you are probably having kids. So if you don't feel you succeeded in your 20's and early 30's, hang on in there 'cause you'll get another opportunity later in life.