I wish that my own personality matched the personality I have when I'm on the internet
Why do you think it doesn't?
I'm very calm and kind as a person yet as a internet persona, I always want to be harsh.
You should strive to be yourself no matter where you are. If you are behaving differently online than in person, then you are being phony and fake.
Nah, this is more fun.
Maybe it's fun for you but people are going to see through your fake behaviour and I'm sure they'd want nothing to do with you. Don't be scared of showing what you really are even on internet.