Is Ronnie O'Sullivan still snooker's best?

Question

Ronnie O'Sullivan was beaten by Mark Selby in the 2010 Masters final, but really shouldn't have let his 9-6 lead slip.

He is the most naturally gifted player in the world but struggles to maintain his focus at times - taking on silly shots instead of playing it safe etc. Despite his flaws, he remains the best player the sport has to offer.