The greatest character ever created by Vince McMahon, 100% loyal to his company, still over after 20+ years with the same basic character (some tweaks along the way, but basically the same dude), the acknowledged locker room leader, a consistent backbone of the company, the reason Kane exists, and the principal character in one of Wrestlemania's biggest selling points for the last several years. What's not to like?
He's had corny moments, but I always thought he was one of the best quality dudes in the business. He's held up his end of a lot of great, memorable matches. He's got the respect of literally every wrestler. He's at a level where he can call the shots on everything he does from now on.
He probably won't want it, but I think the tribute they give this dude when he retires may be bigger than Flair's. That's how important he is to the wrestling business.