I got my little hero out of a shelter, too. He has his problems, anxiety most of all, but I love him nevertheless.
But being a little critical here, by buying a pug and "advertising" them here, aren't you supporting them being bred that way? Whenever a dog is an "in"-accessoire, more and more people get one, consequently inbreeding will harm the breed even more and people not knowing what this special breed needs, sometimes even medical assistance, which is expensive. And this will, at the end of the day, fill the shelters even more. 
For example, there was an ad "starring" a West Highland White Terrier. Because of that, many people got one, thinking they are cute. But they are hunting dogs and need a lot of walks and attention and training. Not quite what you want for your family. So they ended up in a shelter, if they were lucky. Gladly, in my home country we don't kill dogs in shelters when no one adopts them...