Plenty of great things have terrible fanbases. You've heard about its relation to Powerpuff Girls, right? Watch this clip and tell me you don't agree that it's a wonderfully animated, surprisingly good family show:
Besides, most bronies are pretty chill (and good at coming up with sweet musical mixes!).
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http://www.youtube.com/watch?v=SBpfwpOPXNc&NR=1&feature=fvwp
I watch Planet Chasers Starlight Excellent all day, every day.