I have a YL locale, have heard the OE's and others tend to have different personalities. Craig can probably answer your question better, but IME my yellow lip is very relaxed, and indifferent to me, a bit aloof at times. Doesn't seem to mind handling too much when I have to or me being around which is cool. I've heard a lot of parson's are more on the shy side.
On a side note, melleri and pygmies can be housed together lol, go figure one of the largest and smallest species.