I voted a must. However it comes down to the quality of the boob.
They must be perky, and the areola must not exceed the size of a 50 cent piece.
The smaller the areola the better, but nor asian chick small… like the size of a quarter.
Also nipple position needs to be aligned properly.
Preference and I’ve had all sizes I’m sure most have.
34 - 36
b or c C being nicer ofcourse.