Most Helpful Girl
Listen. This is what I have to say.
I just compared this to a baker asking for opinions about a sample serving of a cake he's about to allow for mass production. Some people would love the taste. Some would not. Some would appreciate the free food.
That's somehow related to taking selfies. Some people would love your style. Some would not. Some would appreciate the pleasant sight.
There are many elements involved when taking selfies, like the subject, lighting, and the environment. I think you meant this question primarily for the subjects (people). If someone's going to ask for opinions, then that person also allows opinions to be about lighting and the environment.
Most Helpful Guy
They should keep posting because they want the truth. People can easily be over critical or narcissistic which will paint an unrealistic picture of themselves. They want honesty and or are fishing for compliments.