Michael Marcus mentioned some wisdoms about life of a trader in Market Wizards: Interviews with Top Traders.

If trading is your life , it is a torturous kind of excitement. But if you are keeping your life in balance, then it is fun. All the successful traders I’ve seen that lasted in the business sooner or later got to that point. They have a balanced life; they have fun outside of trading. You can’t sustain it if you don’t have some other focus. Eventually, you wind up over trading or getting excessively disturbed about temporary failures.