Like others, no matter what you say, I think the finale was awesome, even though it was a bit rushed. The question that remains for me is: What is next in season 4? (Oh, anyone have an air date on season 4?)
xD Also, there's two things that need to be answered for me in the upcoming parts for me to be able to die at peace. First, why does Twilight's cutie mark feature 6 white stars instead of 5 everytime (except on her flank)? And, what exactly is her destiny? I guess once more time will tell.