What do you prefer to trade (commodities, equities, bonds, forex, futures etc.)?
and for what reasons do you prefer to trade this as opposed to any other instrument? 
I trade futures .. the Euro, Pound, S&P and FESX   mainly the Euro and S&P.
Why ....Maybe becuase of the leverage. 
and I dont like spreadbetting ...it doesnt work for me 
Although at the start of my career I traded all sorts through spreadbets , oil, gold, index, forex even the hosuing index !!  
But then I spent £££'s on education and stuck with futures.