WELL, since this is the Fluttershy fan club and all, I suppose this is where I can post the reasons why Fluttershy is best pony (at least to me).
Prepare yourself, emotions incoming.
Right off the bat, I knew Fluttershy was going to be my favorite character. There was just something about the way she looked, moved, and spoke that made her seem so innocent, so adorable. As the seasons and episodes went on, I started to realize how alike we were. We're both really shy around new people, but rather open and comfortable around those we're close to. We're both a bit under spoken, and we have our problems being assertive towards others. I was really starting to like Flutters, and then the one episode hit. Hurricane Fluttershy.
To this day, there's been no greater representation of what life in middle school was like for me. I was always that one kid that got picked on because he couldn't preform at the level the others in gym class. I faced the typical name-calling, the regular comments thrown along with them, but most importantly, the isolation. I went and told countless adults, including some of the gym coaches, a few other teachers, and even my parents. Regardless, the bullying never stopped, and I left middle school knowing that times could never be worse.
This, I feel, is what really helped me connect with Flutters, as the whole experience left me self-conscious about every last thing that I did. Tripped on the stairs? Everyone must be laughing at me right now. Let in a goal during a hockey game? Everyone saw and is now talking about how awful I am. These are only a few of the assumptions I made based on regular occurrences, regardless of whether they were true or not- much like Flutters in the episode.
Lastly, overcoming her fear is one of the most inspiring things I've seen to date, mostly because of how well I can relate to her situation. I made me realize that Fluttershy isn't only my favorite pony- she's my hero. She's the kind of person I want to be when I finally finish maturing.
Well, I apologize to those that stuck through to the end to read that, but it's something I've really needed to get out there for a while.
TL;DR: Fluttershy is best pony.