I dug into this myself about four or five years ago, too, curious about it. I had/have no intention of joining up, either, but am always curious about other religions. I am by general definition Pagan, but I tend to plunder other religions for concepts I find appealing ;)
The concepts I found about how Scientologists believe energy works, I can get behind. The mythology is not my style, especially if they take it literally. And the interaction between its members, and between ranking members and new 'recruits,' I dislike.
The only people I know who were Scientologists (and I don't know any who still are) fled from it in rage at the cultlike atmosphere.
I concluded that the mythology was meant to be fiction which some had taken too literally (I conclude that about some other mythology as well!), that some of the people were too manipulative, but that it wasn't completely devoid of things I could agree with.
Looking forward to what others will contribute, too, I'm also curious :) Good subject!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"I am a wizard, not a saint." - Harry Dresden
States with legal same-sex marriage:
Maine, Vermont, New Hampshire, Massachusetts, Connecticut, Iowa, Washington D.C.*