Truely feeling myself as the new shape is the coolest part. As an example I one time shifted into an ant and then a snail. I could feel the body parts and found it amazingly weird to try and move 6 legs in a way that would work. Having extra limbs and feeling it was truely a trip! Then the snail offered the experience of undulating along on that weird foot thing a snail has.
I can fly and climb walls and such with out changing shape, so by far the experience of the new body is the best part.
Great idea for a thread!