It's interesting to me that the #3 and #4 seeds in the AFC are dome/warm weather teams, while the #1 and #2 seeds will be hosting the divisional and conference championship games in cold weather, outdoor stadiums, in the middle of January. BIG home field advantage. The wildcard teams (Bills, Broncos, Jets - pick any two) might have a better chance, just because they're used to playing in that type of weather.
On the other hand, San Diego had no trouble in a snowstorm in Cleveland, and Indy never seems to have trouble anywhere. All-in-all, I'm really looking forward to the playoffs, whether my Bills make it or not (even though, for various reasons, I will almost always root against the Pats, Pittsburgh and the Jets).
-Dave