The pros tend to prefer more challenging games in which strategy truly matters. Or, better yet, games whose outcome is genuinely the result of skill, such as in poker. Plus, being a pro implies making a living from playing, and that implies giving the house the least amount of edge. Games like Roulette, Blackjack, Craps, and Baccarat all provide bets with lower house edge than slots. Even playing video poker with a strategy gives pros a better chance of winning in the long run.