This is something I've been wondering about recently as I find it happening to me at times. For the longest time, I've always considered Twilight to be my favourite pony, but there's also been times when I have found myself finding a different character to be my favourite. Right now I'm finding myself partial to Applejack. At other times, I might think of Pinkie or Fluttershy as my favourite. I think if I were asked the question and I had to pick only one answer, I would still say Twilight was my fave, but maybe it's a case of not really having one particular favourite pony, but rather just liking them all and finding my preferences changing based on mood, or whatever episode/movie I may have watched or song I may have heard etc. I don't think there is a single character that I flat out dislike, except for the ones that obviously you're supposed to (e.g. Diamond Tiara and Silver Spoon). But I was wondering if anypony else felt this way?