What do you think about me backing into a parking space?
Why are you going to back into a parking space?
Because I want to impress people with my driving skills
Being comfortable with parking backwards is awesome but you should make sure you're trying to be safe while doing so. Potentially getting into an accident just to impress others isn't worth it.
My driving is fine, I can do whatever I want.
It's great that you're confident but you should still try to be conscious of both your driving and the driving of people around you. Backing into a parking space is fine and it's great that you can do it, but be sure to look out for others and be as safe as possible while doing so.