Search some threads and see how many people hated their Glock 19. Not people who don't like Glocks, but actual owners who were displeased and got rid of it. Compare that to the number of posts you'll find saying it's the best 9mm handgun on the market.
And, No, this isn't a cool-aid post. I really mean for him to take a look at the percentages. They make an argument on their own, regardless of what pistol I like. If Glock isn't for you (shoot anything you can get your hands on first), then get what you like.