At any point in your life it's pretty difficult to say that you are going to do something for the rest of your life.  I feel that being vegan is different.  After spending a long time being vegan, I feel that I will be for the rest of my life.   It will have been five years this Fourth of July, and I don't see myself turning back to eating meat or dairy any time soon.  This has become my life and lifestyle.  I feel better than I have any time in my life, and look better.  Maybe its become so second nature that I might be able to make it to the grave without eating another animal.  That would be a great achievement that I would be very proud of.