I tried both my blogs, and my business website, and got the same answer:
ESTP - The Doers
The Doers are happiest with action-filled work which craves their full attention and focus. They might be very impulsive and more keen on starting something new than following it through. They might have a problem with sitting still or remaining inactive for any period of time.
I have never thought of myself as an extrovert, and I have no problem sitting still (so long as I am working or playing the cello or knitting, or drawing...). Well, maybe I am active in that sense.
I am curious to know what others get. I tried one fellow-cello-blogger who had the same result, and one who had a different result.