Rainbow Dash, she’s actually the reason why I watched the show in the first place. Her determination and personality make her a pretty well-rounded character.
Although technically this description could apply to anypony, Pinkie Pie just has this that i can’t explain (i’m horrible at explaining things) but sets her apart of the others.
Fluttershy, because she is perfection. xD
Kind, gentle, smart, assertive, hot for pony standards, fond of animals, remaining quirks that aren’t annoying.
Cloudchaser. She seems very fun-loving and close to her sister; clearly intelligent, skilled, and serious enough when she needs to be, to have an important role on the Ponyville weather team, plus having been made a flight leader in the Wonderbolts Academy; was curious enough to be the first to ask what Twilight’s anemometer was (even if she, like all the other ponies, didn’t understand her explanation); shown to be helpful many times (very eager and prominent in tornado duty, rescued Fluttershy
Her adorable mane and eyeliner don’t hurt either. That fashion was from some of the best times to be alive, so it’s nice that she appreciates that spirit. Nor her noted athleticism and flexibility.
Luna or Tempest. It’s a long story no one would care to read about though. I just have many things alike with the two and I trust them more than I would a real person. Even though it’s inside my head, my imagination is really the only thing I have that keeps me happy out of my mostly-tedious life.