I day trade ER2, YM, Euro, and sometimes ZG. I am still struggling in my first year to make money. I have lost less than 300 on a 5k account. I have been trading real money about 3 months. When I get consistent I will fund with another 10k or so. NQ whew, don't like the moves, or lack there of. ES has more program trading than any instrument.
ER2 can be violent, but if you get the direction right, which I am good at, and scalp you can do fine. The currencies move nicely. I trade the futures not the casino forex.
Oh the YM, you have to get a real big move or trade minimum double your normal lot size, or commissions will eat any profit you get.
Dan