OK... Stoya for the win!
After sampling bits of Sexual Freak 7, Lust, Cheerleaders, Jesse Jane Kiss Kiss, Razordolls, Video Nasty 3, and Sister Midnight, I was impressed.
My first impressions were right on, Stoya's scenes are filled with energy and excitement. She gives the appearance of one who genuinely enjoys her work, as evidenced by a a great smile throughout her scenes.
Her genuine 'glow' and bouts of laughter give an impression of innocence to even the most hardcore scenes.
Most importantly though, she is consistent. All of the movies displayed the same joy and energy, which ultimately led to my (surprising) vote for Stoya over Sasha Grey.
I have a new favorite and will have to keep a close eye on Stoya as her career develops.