Human is evolve to eat meat, we are hunters by nature, that's why we have stereo visions. Our eyes are in the front so we can judge distance to hunt animals, not that wee hunt anymore fro our meat. Just farm our way to the dinner tables these days.
Personally, I can't go one more then a few days without some meat, I'll need something like fish at least once a day, but I have gone unintensionally gone 3 days eating vegetables and rice only. I actually like vegetables, all kinds too. From you peas and carrots to leaf vegetables and big melon type. But I have tried the veggie saugages and burgers, they tried to make them taste like meat but it's no where near. But I was thinking why would they make a veggie burger? if someone want a veggie diet, he/she surely don't want a burger, it'll just make the taste for the real thing stronger.