I gave this year a C. It seems to have had more ups and downs than a usual year.
We had some bad things happen -- I lost my job, our dog died of cancer, we had to cancel a vacation (because of the dog), we got in a fender-bender, son is having a difficult adjustment to middle school (normal growing-up stuff, but I hate to see him suffer). But things could have been worse and we had some good things happen, too. I found another job quickly (not quite as good as the previous job, but I feel lucky to have it). We had a great family vacation (we had two planned for the year and we were able to take the first one). All in all, good and bad sort of averaged out, but I am hoping that 2013 is more calm and even-keeled!
My best year was probably 2001, when we adopted our son. <3 (Adopting our daughter was pretty great too, but there is something wonderful about becoming a parent for the first time.)