What health problems does a miniature boxer suffer?

I had a Doberman and it died about two years ago. I am still not sure if I want to keep another dog. I was passing by this pound when I saw this miniature boxer and I just thought it was the cutest thing I saw in years. I have a couple cases of the miniature boxer having a lot of health problems. Would you happen to know which the most common one is? Is it better to have a pure breed instead of hybrid?