I wouldn't get involved in Paxful myself as both their CEO and CTO got arrested a few months back for having weapons and cocaine in Miami. LocalBitcoins is probably the most used out there but I don't like it due the fact that we need to provide some real life information's.
I prefer using Bitcointalk (currency exchange) as a trading platform all of the time as It's not that hard to spot scammers and there is a lot of DefaultTrust members who are active in that section which make it easy to do business with them without worrying much.