What Is Reason For Not Getting Any Bruises?

I am a 21 year old male and have never had a bruise. I used to think this was really cool. But now I worry it could be the result of an underlying medical problem. Everybody says its just because I havent been hit hard enough. Thats wrong. I play college soccer and throughout my career I've broken bones, stitches, and sprains. What got me thinking about this today was was yesterday I got directly kicked above the knee and it was the most painful thing ive ever experienced. Today its not bruised like usual. Any reasons why this could be the case and should I be worried about not bruising?