I think a little bit tighter crop on the bottom would have been a little nicer. In any case, I give it an 8...I think this pic did something to my subconscious...you should have put the 10 ball in focus. lol
good DOF, but a closer crop, maybe to portrait format (10 % off left side, 25% off right side) had brought more oimpact. also wonder why you converted to b/w