I'm not going to make any 'you know nothing' references in this article, that line's been done to death. However, the new Kit-kraze as I like to call it, comes in the form of his beard, or lack thereof. Kit Harington's beard is one of those stringy, forgettable wisps that you really don't pay any heed to until it's gone, wherein everyone loses their collective shits and prays to the follicular gods for a quick and easy return.
As you've guessed by now, Jon Snow got rid of them stringy wisps, and went from this -
To this! Lord have mercy.
Why? We don't know. How? Probably with a razor or something. All we know is he now looks like a White Walker with a whole lot of love for Alice Cooper, à la the eyeliner.