For pure aesthetics, how much should I weigh?

Can't be answered . Without more info i can't say what a healthy weight for you would be. From an aesthetic standpoint there is no "ideal" weight.
May vary. There are no absolutes here and it depends on an analysis of muscle mass but the body mass index (bmi) is a good starting point. For adults, an ideal bmi is within the range of 18.5 and 24.9 is considered a healthy and reasonable goal.