What does Blood Type Got to Do with It?

Apparently a lot.  I have O- blood type which is the universal donor.  I read my supposed diet and found to some strange degree that foods that are supposed to be good for me, I actually liked.  Those that were bad for me, sometimes I didn't like but could eat. 

I wasn't supposed to be a coffee and spirits drinker.  But I am... so this is supposed to be bad.  The type O blood is supposed to be the primitive Hunter Gatherer blood type.  It makes sense because I am always hunting for something and am trying to gather other things... with limited success.

Having type O- blood is good and really bad.  It is good for other people, however, I can only take blood from my own type.  I hope to not have any problems with this.

If there is a serious case in the UAE or Qatar (because I live here) I am ready and willing to give my blood.  I was a donor in the US for this reason.