I really like Mats - he seems to try hard to give honest answers to questions.
Here's a short interview of him talking about kids and trying to turn them into professional players:
Another one of some young girls asking him questions, and again, you'll see how thoughtful he is in answering:
Good guy. I have long known that he was a fantastic all-around player with a great head on his shoulders, but didn't realize how insightful he is on all things tennis.