I gotta say, Piglet was the character I always felt resembled me most (not least because I'm petite and small-boned, which means I'm also a Very Small Animal.)
He seems to be consumed with thoughts of bravery and "saving the day",which seems appropriate for an SP. I always loved the stories in which he's envisioning himself being ultra suave and nonchalant while confronting a Heffelump, but when he's in a situation in which he thinks he's
actually meeting one, he messes up his lines and goes all inarticulate. AND YET, he's actually a brave little guy whenever he just does something to help someone and doesn't second-guess his own ability. Piglet's good at Just Doing What Needs To Be Done in crisis situations.
Also, Piglet's got beautiful scripty handwriting that's much more elegant than the others' (if you look at the pictuers drawn by Ernest Shepherd in the original stories). I think he's got untapped artistic potential.
Sarah
ISFP