Great thread and appropriate timing. I'm no Jericho fan but I respect him, which is even better. He used to have jobber mannerisms, to which he admitted himself.
Since returning in 2007, his body language is infinitely better. He's in control of his career and isn't a slave to the business.
He mentioned in an interview, at one point, that he'd never put out a t-shirt. I'm not sure how much truth there was to the statement. The interview was fairly recent, but I cannot confirm that either.
Ultimately, Jericho had a deep learning curve. HHH's position in the company was a thorn in Jericho's side for many years, his entire first run. I have mad respect for this dude. He's overcome a bunch.