A name if your identity. People call you by your name. There is no other names better than your own name so when you pick a name for you characters, you should put into consideration of what you should include and not include when naming your characters.
First of all, let us refer to the TOS by Blizzard regarding naming characters.
You are not supposed to give names that:
Is this clear enough?
Perhaps you need more explanation. Ok moving on, let us look at the different degree of appropriate or inappropriate.
Most inappropriate:
Make sure you do not name your character as ‘boobies’ or ‘damnit’ or risk losing everything you have.
Medium inappropriate:
Doing any one of these will cause a warning letter. Remember, it is never a good thing to get a warning.
Restricted:
Do one of these and you will be prompted to change your name every time you log in to your account. What a hassle!
So, avoid at all cost getting into troubles with Blizzard and play your game safely.
I know some of you take this as a challenge to break the rules but then again think whether it is worth it to lose your account over something out of mischief!