I'm a Brony

1. It has good funny/adventure/drama/weird stories that are well-written and attention grabbing (drama is very, very, very rare to see in little-kids cartoons these days).

2. It has well-made and well-rounded characters with great personalities that evolve through the series, and play off one-another awesomely.

3. Great comedy that can make almost anybody laugh (and it's even family-appropriate too).

4. Sometimes has musical numbers with fun songs that have well-written lyrics, and that are catchy.

5. Has great flash-animation that can even be mistaken for hand-drawn sometimes.

6. Teaches great lessons and morals that: anybody at any age can stand to learn or remember; and that are definitely well-needed in this day and age.

7. Treats its audience with respect and not as "dumb kids".

Long story short: This is an amazingly well done series for a Saturday morning cartoon show.

So you see, just because it's a series that is aimed for little girls, doesn't mean it's only meant little girls to enjoy.