If I had to pick a favorite from the big 5 it would be Jon. Used to love Tyrion but his dialogue and story line has been shit lately (not PD's fault). My favorite secondary characters are Bronn and Qyburn. So if you want to try and get some digs in on me now you have a better target.
Jay Cutler of Got's, I have to admit, I laughed at that. D & D have prolonged and dragged out Jamies storyline, in the books he has already left Cersei. I focus on him, not because I like the character, but I think he is the missing piece to the "dragon has three heads" prophecy. Part of the fun of this whole thread, and the show, is trying to figure out what will happen next, who will sit on the iron throne, by who and how will the night king be killed,etc, etc.
I was not trying to justify Jamie pushing Bran out the window, just pointing out the irony, if the Bran/NK theory is correct. It was part of my off the wall full circle theory I posted a few pages ago.
I think Tyrion being the third head has been a red hearing planted by GRRM all along, I think a second "secret targ" cheapens the storyline, and in some perverted way justifies Tywins treatment of Tyrion, when the truth is, Tywin was just a big asshole.