Let's face it. Everyone who does not fall into the tiny niche' of "normal" society, (which is just about everybody), is where they are for a reason. Just about everyone in the entertainment business has issues. You look at almost any famous person deeply enuff and you will find some deep seated psychosis related to some shortcoming that may or may not exist anymore.
They are not all physical either. Sometimes it's some bizarre attraction to power they never had. Whether it's for money, control, admiration, or adoration it's there. Of course this does not hold true for everyone. There are those who have an honest to some deity calling to go against the grain and believe they are on a mission to further the art and expose themselves and others to something new.
Once you stop doing something for a reason and are just going thru the motions, it might be time to re-evaluate your priorities. It's like my theory why some bands music starts to suffer as their career goes on and on. They run out of things to say and are just taking up space to make a buck or fulfill some previous contractual obligation.
Be honest with yourself sometime. Really take a good deep look and figure out why you do what you do. Is it selfish or perhaps you weren't hugged enuff. Of course if you are well aware of yer issues, then you are one step ahead of the game. I will tell you who might very well be the most screwed up of all of us tho'....