This is a really nice animation of Spike. I like how it conveys a lot of action with not a ton of frames. Great job! I also like Spike's character a lot too, for the same reason I like Applejack and Celestia. All those characters are good support or secondary. They are not really flashy or stand out, but they provide the backbone to must groups. Also, they are usually very content in their role of assistant, background or just not like as much those that are more popular.