Thanks for this thread, Maury.
Addictions manifest themselves in different arenas. Often, they are unhealthy to ourselves and more painfully, to others. I've struggled with gambling and alcohol, hit rock bottom with one, give it up cold, and put more into the other, a vicious cycle. The phrase "addictive personality" is used and there is chemistry to support. 100proof's post has a lot of truth to it. That isn't an excuse for us though - we need to make better decisions with physical/chemical need we have.
I'm the type that doesn't enjoy "naps", "relaxing", or even "reading" - where some people crave those things - my mind goes wild and I need to keep active. I do not like idle time, I do not like being alone. It took a while, but i've found productive, or at least hobbies that aren't harmful to self or others. I put a lot of hours into home repair (self and others), carpentry, wood-working, coaching sports, etc - and each fills a personal need I have to be active, engaged, busy, etc.
...and you're right. There is no shame in faults - the shame comes when we hide them from ourselves or others. Thanks again for sharing this - I suspect it's liberating for you and you may not know it, but you're helping others as well.