I didn't eat meat for about 5 years. One day I just bought a quarter pounder with cheese from McDonalds for no particular reason other than I felt crappy after being sick for two weeks.
That was the tastiest thing I'd ever eaten!
At the same time, I don't know why I do eat meat now but I seem to crave/need it and just can't shift that. I don't usually actually like it either ironically (apart from that one quarter pounder above).