I just need a regular user account when I don't want to play around as root. I'm also very accustomed to "sudo" at this point as well, so having a regular account would almost fit better.

useradd - "fill in the blank" is this fine to do alone or is there any safety precautions I need to take?

I just need an account that I can use for Starcraft 2 or Diablo 3, Web browsing, and etc... Is there a complete guide to this? I found some guides, but with BT5 R3 I am brand new.

On another note I'm surprised how much easier and more flawless this seems than Ubuntu from the start. (Long time Ubuntu user ready to switch).