How to judge if someone is good

If the technology ever gets advanced enough, someone should create a realistic simulation of what the world would be like if everyone were you. You wouldn't experience life from all their perspectives but rather everyone on the face of the Earth would look like you, have the same personality, talk like you etc. Of course each of them would have different experiences and would accomplish different things but it would be interesting to look at the global effect of such a move. For example, if everyone on the Earth were like me, I assume the Earth would be more quite. The global food shortage would probably be resolved because all the people who eat more than me (that's a lot of people) would eat the same amount as me. Fastfood chains would go out of business since I haven't eaten fast food in years. The number of cars on the road would be significantly reduced since I assume all the versions of me would be equally as incapable of passing the driving test. I guess that solves global warming too. There would probably be a lot of bad thigns that happen as well but self serving bias won't let me think of them. Also if everyone were me, how would the many versions of me reproduce? I guess that's a question for another time.