Sevenseas, I do think there is a measure of self sacrifice involved... For me personally, I'm sacrificing: family acceptance... willingly taking the poke, willing to be seen as being "holier than thou" (even though that isn't the case), willingly missing out on a great dish that Aunt so-and-so brought from wherever, willing to have what I'm eating be scrutinized as to it's veg*ness...
I used to be able to eat the same things as my husband, but now I'm cooking two meals, so yep, that's a small sacrifice.
I used to be able to eat wherever I wanted, now my choices are slim, and I carry a CLIF bar in my purse, so in this case I'm sacrificing convenience and possibly hunger.
SA (standard American) food is much cheaper than healthy vegan food, so I'm sacrificing my wallet when I choose vegan food.
Constantly having to think, read labels, read up on additives, education...which would be unnecessary for the omni, sacrificing time and brain cells...
Cosmetics are the least of my problems!!! You buy them once and they last for months, food is the every day issue!
I could add a whole bunch more. There are tons of sacrifices, but none are made begrudgingly (except maybe faux cheese), I feel like so much better of a person and much healthier for what I'm doing. Conviction does feel good, but if there wasn't sacrifice, I'm not sure it would feel as good, it would be too easy.