I don't know if anyone said Mason was a "bad guy" - he and Kill are just different personalities, and different in the way they approach their job. By the end of his tenure, a lot of people felt Mason was not doing all he could to promote the program. Kill, on the other hand, certainly seems to do a lot to promote the program. Kill goes on the sports huddle every week to talk Gopher FB. Mason seemed to vanish in the off-season.
Now- could Kill be putting on an act? could he be a real sum-bitch when the cameras and microphones are off? I suppose it's possible - but there is certainly no public evidence to indicate that Kill is anything but genuine. Yes, he's a D1 head coach, and I'm sure he can get tough with players if he needs to. But, to the best of my memory, the only person who has criticized Kill publicly has been our old pal AJ Barker.