I myself have been vegan for the last 15 years. Of course, living in the city I do now makes it much easier to be vegan, but I've definitely lived in places/situations where it wasn't as easy. I think most of the militant convert-everybody-veganism happens with kids who have only been vegan a year or so. I find that I'm still learning more about it every year. The primary reasons for my veganism have changed over the years.
BTW, Hi to Diapered Witch- it's been a while since I've run into you online (I think you had started a Yahoo group for vegetarian ABDLs that got overrun by spammers eventually). Strangely enough, it seems I read about as many posts from other pagans in this community as i do about other vegetarians. Both myself and my girlfriend/babygirl are pagans (Faery faith and Wicca largely, but definitely eclectic). It's nice to see that both vegetarianism and Wicca can be discussed on this board without flamers.