Considering pre-war robots mostly looks like http://images3.wikia.nocookie.net/__cb20110126021018/fallout/images/5/5b/Protectron.png, I don't think you would look too well being a humanesque robot aka android. Android technology wasn't present before the war or in the Fallout universe until Fallout 3 introduced androids and the Institute most likely being the Massachusetts Institute of Technology that developed androids sometime
after the war. So unless you are an android that has escaped from there and if the game takes place around that area, which would be a very predictable story line I'd say, then I'd say that the possibility of being a robot yourself is rather low. And also, I don't like the idea of being one either.
And you should use the official suggestions thread as the moderator told you, you did post there but then created this topic about the same thing again? Keep to the official thread.