I never watch Leno because it's too late but he seems a decent enough guy.
My understanding is that for whatever reason the suits wanted Conan to have that Tonight show spot. Leno wasn't very happy about this and so to prevent him from going to another network they agreed to let him do his 10 o'clock show. I didn't watch his 10 PM show either...

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.