Who's your favorite pony?
I have to say my favorite pony is Rainbow Dash, although Applejack is a very close second.
When did you start having that pony as your favorite?
I believe it was at some point during the first episodes I watched. What episode, scene, or fanon made her/him your official favorite?
This I don't remember, as said above somewhere during the beginning. Why did you like him/her because of that?
Dash is most often seen as the "cool" pony, and my reason for liking her has some to do with that. However I think it goes a bit deeper than just her self proclaimed awesomeness. When it comes to the mane six, the pony I resemble the most is actually Fluttershy. My passivity and social anxiety is something I've always struggled with, and those where things about myself I didn't like at all. I've always been drawn to strong personalities and wished I displayed the same attitude they portray. So when I see Rainbow Dash being well, Rainbow Dash, I am instantly drawn to her. Because just as Fluttershy is was (seems she's overcoming her issues, as I am) a cartoon embodiment of what I disliked about myself the most, Rainbow Dash is the cartoon embodiment of what I wish I had in me, even when she's a self centered jerk, because sometimes I wish I could be a self centered jerk, but I'm too "nice" for that.