My pastel is by far my most outgoing snake... my normals are usually only out for a few hours each night but my pastel is out ALL night long, starting the night he got here except for while he was in shed.

I'm sure part of it is that your high end morph is sure to be several generations captive bred, and will just have naturally been selectively bred for feeding, and for faring well in captivity. After all, picky feeders won't grow as fast and will therefore take longer before producing their first clutch if ever, resulting in lines with better feeders overall.

Also, you'd probably tend to pay much more attention to your high end morphs and notice them be active moreso than your normals. So, you'd be less likely to notice your normals being active. My original normal male is the only other one I observe on a daily basis, as it and the pastel are the only two kept in my room.