No, there isn't. That's why I pick people who like to enjoy the same kind of game that I like. None of my players would fail to pick a personality and roleplay it. That's just the kind of players that they are. They don't all achieve it to the same degree, but as long as a player is trying, that's all I ask.
As someone whose campaigns are both in gaming stores (and I didn't have complete control of who joined, and I was specifically looking to game with new people anyway), I believe the DM also has some minor influence, here. If you run a campaign to reward murderhobos, you'll get murderhobos; if run it to reward a different playstyle, you'll probably get something closer to that.