I lay my basis on the broker's withdrawal method, their track record which is very important to me as I would not want to get my funds stocked with some flimsy excuses, then the type of accounts they offer especially the cent accounts since there are times when you need to try out somethings without risking much.
Well, I also think that you should as well lay the essence on the broker regulation status knowing the country that regulated them because at time I have seen the brokers that emerges from the USA not ajjowing the hedge strategies. Don't know if its what they agreed on.