honestly what annoys me the most about Billy in s4 is that he's still smart, he still can be talked to, he still sees the reasom behind things, he still stands up for what and who he believes in, he's still doing all he's done before and more, except.... he doesn't know when to shut his mouth and stand down and he's sooo goddamn stubborn about the wrong things at the wrong time, and he expresses all this in the wrong way.
when there is a moment of calm, mostly when Flint is nowhere in sight, he's still reasonable and a good ally. but as soon as the action starts or Flint appears, all his common sense flies out the window. and while he's playing the character perfectly, I'm mourning the potential for what could have been.