I have noticed several personalities that seem 'out of place' in their categories. These personalities follow:

Prudent
Calm
Wary
Gentle
Focused
Awkward
Laidback
Evasive
Modest
Timid
Secretive
Humble
Loner
Even-tempered

Because of this, I propose a new personality category -- Quiet. In addition, I think Shy would be an interesting personality type to include.

Effects of Quiet (Uncommon) personality on other lions:

+5 mood for lions in the Quiet category
-10 mood for lions in the Neutral category (simply because we have no personality type that does this :P)

If Shy was to be a male personality, the bonus effect could be that your lion encounters significantly fewer lions in explore (with Hyena Butter, but only affecting male lions, not lionesses. Possibly cancelled out by Snake Scent?)

Now, I know what everyone is thinking. WHAT WOULD THE PERSONALITY POSE LOOK LIKE?

The wonderfully talented and extremely kind DEERTUSH was kind enough to draw me a rough draft of a pose!!

I don't remember the image code, sorry!