Mental illness, and, you know, the whole God thing aside, Terry Davis was one dedicated motherfucker. As crude as templeOS is, the shit he did to create it is pretty impressive.
I'm too afraid to install it for fear of bursting into flames tho.
I once met someone back in school (eons ago) that was both a devout Born-again Christian and wildly enthusiastic Linux user. I once remarked that I personally witnessed him convert more people to Linux than Christianity.
Stupid teenage me didn't mean to come of as so savage, but judging by the look on his face, I think that broke him a little. :(