I'm a vegetarian, but I didn't do it for the ethical reasons (although I don't think I could eat meat again because of my ethics), and I didn't do it for health reasons. I did it because it was a Wednesday.
I simply decided one day, with no previous thoughts about it, to throw away all meat from my refrigerator and be a vegetarian. It's now been over 6 months, and while I've slipped up a few times, I'm still going strong.
So I want to know if anyone else has become a vegetarian/vegan just because like me, and if there are even stranger reasons behind it.