In my opinion, I'd have to say waitressing. It doesn't seem that hard, but dealing with people all the time, even the ones who are nasty (and you can't tell them off) is EXTREMELY stressful.
Would you rather get a computer virus or the flu?
The flu.
Do you believe in Karma?
I do not.
What would the world be like without religion?
Difficult to say- there would be less war, but people would be more cynical and more inclined towards anarchy.