If i had power's i would not try to make world peace, thats what makes war, becuse people will not make peace, and you making them will only make them hate you even more, id leave mortal men to there own fate, but i will have no choice but to defend earth if a guy like majin buu or cell attacks, i just couldint do nothing, i would not really spend all my time training for wars, but i wont neglect it ether, becuse if you dont use it, it will become weaker, i will fly around space in my spare time, and i will cybernate myself, becuse if turning a human into an android will do what it did to 17/18/16/all the androids, what will it do to a sayain? i do not belive anyone can be perfectly good, but you can be a "Good guy" and fight "Bad guys" so i would, i would not kill anybody unless i had no other choice, not even people who make me mad, as a matter of fact id bless those who made me mad, becuse voilence is pointless, i will not even kill a bad guy like super buu or cell unless they were about to kill someone and i had no choice again.
Sorry that its long, but if god graced me with powers i know it was for somthing other than for my glory.