I liked Federer's resurgence, played so much better than in 2010, 2011. Wimbledon 2012 was my favourite moment of the year.
The AO was also memorable with Djokovic winning 2 5 setters in a row (5 hours vs Murray, 6 hours vs Nadal).
Murray's emotional win at the Olympics was nice to see and I'm glad he finally won his first major.
WTF was also entertaining, especially the final.
Clay season was pretty boring to me, Nadal is just too good and it has become too predictable, the only entertaining part was everyone whining about the blue clay