My main weapon of choice is the Gold. I might trade from time to time other instruments, from forex to indices, but there is not a single trading day in which I haven't opened any position with Gold. I don’t keep any open positions overnight, so you might guess that the spread is very important for me.
The spread on gold is veeeery important when I choose a broker, and this is why I have chosen to trade with T4Trade. The most common spread I see on the charts is 0.15 pips, which is great.
I don’t know about other instruments, but for those trading gold I can totally recommend this platform.