I think there are two ways to roleplay. One is to be like an actor/actress who is been given the choice of multiple roles to play. You can pick any role, and try it on for size. You can experience how it would be if you would be someone totally different from your true self, someone with an interesting backstory perhaps. You can pick a role that allows you to truly prove your acting skills and to experience a life very different fro your own.
Alternatively, you can roleplay as yourself. Use the character builder to create an avatar that physically matches you as closely as possible. Assuming you are human in real life, play as a human. Pick a class that matches you real life occupations. Try to capture yourself in the ability scores you set. Then teleport yourself to Fearűn and start adventuring.
You probably guessed it already: trying to play as yourself will eliminate choice paralysis.