I don't imagine my parents are too excited about my kind of life. The surrounding weirdness bothers them. Still, I think they're pretty good. Their lives are based on what their friends think, just like ours are.
The main point for me is moral; animals are sentient beings. I know for some this is a hard argument to accept, but we're not built to eat a lot of meat.
It takes a little work to be a vegan, but now it's really possible to have tasty stuff and it's better for you. I say the best test is go as far as you can and see how you feel. Personally, I feel great.