What's in a pool nickname? A lot really.
Some pool players are likely to not think too much about what nickname they use when they first sign up for an online pool game however this can be an important part of the mix for playing against others.
When people are in a pool game network they are deciding on who they are going to play against by only a few things.
The first would be the skill level, if the pool network you're playing on doesn't show the skill level of your opponent then you shouldn't be playing there!
The second (especially if you're playing for cash) will be how much you are willing to play.