I love all the Firefly characters, but Jayne's gotta be my favourite! He's a mercenary with a passion for brawls and weaponry. He betrayed his partners to join the Firefly crew when Mal offered him a bigger room to sleep in, which does make you wonder if he will ever turn on Mal at some point, but you've gotta love him.
Jayne particularly hates the pretty doctor, Simon, and one of the best tricks he plays on him is getting Simon to put on a spacesuit in order to board a pressurized ship, as he knows Simon is afraid of vacuum.
Though Jayne is the tough guy, he does have his moments of sentimentality, like when he buys apples for the crew and wears the ridiculous (and awesome!) hat his mom sent to him. And then there's the time he was the Hero of Canton, where he robbed from the rich and gave to the poor.
Jayne is played by Adam Baldwin, and I also love how in the TV show Chuck, Baldwin's character Casey makes several Jayne-like references, including calling his car "shiny" and telling Chuck he is "damaging [his] calm."
Shout out to blogger buddy J: Gotta be to my buddy Alex from A Novel Journey! And how fitting that it be on the Firefly post, as we have bonded over a love of Firefly, among other geeky things.