I'm primarily a swing trader so I discover that my trigger doesn't go off until any time between 2230 and 1000 PST... so trading at the Asian session doesn't actually affect me.
I'm working on an intraday program and while I enjoy the reduced volatility and calmness of the Asian session, it simply doesn't move. I don't wish to have to wait around for three or four hours to create ten pips within an intraday system. That sucks and kinda ruins the entire point of trading on fifteen or five minute timeframes.
That's probably why I'm a swing trader -- I will make 200-400 pips in 5 days. THAT'S worth the wait.