For brokers, I seek three things: regulations, trading conditions and pricing. I don't see any point to trade with brokers if these three things does not meet.
I have opened some accounts over years and have split the funds to few brokers, not to mention I'm still very open to competitive broker be it old or new. Currently my main accounts in order including pepperstone, hotforex, IG, fxview. It's possible to find good broker for yourself if you're good in online research, and try to avoid following popular suggestion, my piece of advice.