The advantages of your 0 negative blood are for the others; anybody can suck your blood 🙂
The disadvantage is for you; you can only receive blood from someone who has your blood type.
Well, you can think of yourself as a special, which is a BIG advantage and try not to spill your blood for worthless causes.
In that regard, if you are a Muslim, Allah will put you in the hell (there are no virgins there) if you waste your blood in suicide bombing 😉