I don't want to tip my waiter
Why don't you want to tip them?
They'll give me the same service regardless if I tip them or not.
It's not okay to not want to tip. Many people will think you're impolite for not tipping. You should tip regardless of the service you receive.
Sigh I don't know about that.
Tipping is considered a good thing to do. It would be wrong not to tip a server especially after they have served you well. It would look good to tip them kindly.