The things I have heard about Mike Leach don't bother me in the least but I may not have heard all there is.
What I do know is that he brings an exciting offense that would fit right in with our history and that he brought two programs that are in a similar position as ours in their conference from the doldrums (where we are right now) to respectability. I could honestly give two craps about his public speaking skills and if that is the biggest knock on him I wouldn't hesitate for a second to hire him.
All that said, I don't see what draw there is for him to Purdue. He's already at a P5 program. According to the link below he already makes nearly 3 million a year at WSU. Doubt we can top that and I don't think there's any reason for him to want to come to Purdue to start a rebuild all over.
http://sports.usatoday.com/ncaa/salaries/