What I'll be most looking forward to in 2013 will be...
2014. No more of those ghastly high, stepped or stepped-&-shrouded noses but proper decent low ones, narrower front wings, V6 turbo engines with (hopefully) more of a roar than a high-pitched scream, and a Mercedes / Hamilton combo with a season's bedding-in and ready for a title fight.
As for 2013, I'm hoping for signs of promise from Merc with maybe the odd win for Lewis, further improvement from Williams, another near miss for the red team and a Mexican world champ.