I was vegan for only about 6 months. Doable. Did it for a
   girlfriend. Was vegetarian a number of times. Much much easier
   to deal with. But, I like beef. Steak in particular. But if I
   had to go back, I could. It's not hard as long as you learn
   proper nutrition. Pasta Vegans are future diabetics but with
   proper diet education, it's doable