I don't mean to stereotype but.........
My experiences have led me to conclude that, in general, the hotter looking the MPA, the more distant, cold and mechanical the session is. Likely due to them getting business just based on their looks and not needing anything else.
I will say, definitely, there are exceptions out there ( in my books - Angela at Club 2 / IT, Lisa at Club 2, Savannah at Silhouette, Rachel at Piccadilly ) so don't everyone pounce on me for the generalization.
I have not seen the following hall of famers, which I am sure are exceptions : Jenna, Cameron, Tarah, Little C.