I agree with the comments above about being able to spend some time once in awhile take a step away from the day to day life. That is why I enjoy running the RC submarines so much, I find it relaxing, and it has nothing in common with what I do for a living. A little fantasy once in awhile doesn't hurt anyone I don't think. Giving yourself a nickname is no different, I think if we want the real name displayed it can go in the signature line that way you don't have to retype it.
Anyway I have to get back to commanding my type VIIC in the North Atlantic.