To be honest - mostly I don't. I mostly prefer to pick a predetermined character from a selection of available characters and then to jump directly into the game. If that's not available then I only do the needed choices, spend a little moment on how to distribute my skill-points and what else is most important and then click go.
What keeps me from doing so is if something special has to be chosen - a ability unknown or uncommon so far. This let's me take some time first.