I've traded the /ES prior to switching over to the /NQ. Stops can be tricky! A lot of it depends on your risk tolerance. Many people tout risking only 1% to 2% of the account size on any one trade. However, with pullbacks on the /ES, that 1 -2% is too tight and will always stop you out, only to have you see it reverse in the direction you want.....very frustrating to watch!
What worked for me was first developing a process I could fully trust and then employing a risk management system tailored specifically to my own risk tolerance. With that said, if you can't afford to lose x dollars based on risk tolerance, you may be trading the wrong instrument. Many people naively believe that applying what worked in stocks can be transfered over to Futures....which is totally incorrect. Both have different risk profiles. My suggestion is first develop a sound process on a paper account, then apply risk management tools to help mitigate loss BEFORE you attempt to trade live.