Given the current margin requirements for the KOSPI future, one can quickly lose interest in trading it, despite the superb volatility...however, I look to this market not because of the futures, but because of the options.
Have you ever taken a close look at them ? Spreads are just one tick (!) and they are so liquid that you just freak out at the sight of the order book. Therefore, they can be and in fact are traded like futures intraday. The combination of insane leverage on top of the high volatility in the underlying index and limited risk makes this market one of the most interesting in this world to me.