They ARE all different. I wouldn't say Simon is hyper, but curious. Anywhere I am I can catch him peeking after me, even if it's from a distance, he just cannot help but follow me - not even for attention, but for the simple sake of being a curious boy who can't miss out on anything! Best example is this photo... I was in the snow playing with Delilah...... it took someone else pointing out to me "Hey is that your little dogs head there in the background?" Lol.... it sure is.
http://dmorgan.diaryland.com/images/100_0197.jpg