Oh, yeah, I do roleplaying stuff all the time. Like Aluminumfoil, I do so for character personality more than challenging restrictions.
In 0.7, my longest lasting character was a nerd named Thaddeus. He gained most of his morale boosts from reading, and considered it his mission to preserve human knowledge. So he insisted on getting all skills up to a minimum of LV5. He cried when the local library burnt down.
My current character, Jason, is more like myself. No hurting animals, no eating meat (ironic, since I’m using him to set a new personal record for kill count). No hoarding or staying put too long. No setting uncontroled fires (he harbors a false hope that real humans will eventually re-settle the towns).
When Jason’s through, my next character will probably be a large, pyromaniac, amoral hoarder, just to do something entirely different!