I've been playing MMORPGs since the Web became available, and I've played table top RPGs since 1980. I have also deliberately started male and female characters in several online games to judge comparative attitudes within the micro-culture of the game itself. So while I hardly know a lot about 'em, I think it's safe to say that I've considered these questions, and that I'm aware of at least some of the possibilities.
As for the differences between girls and guys pyschologically, the different natural steroids might prove to be a large factor in behavioral tendencies and would help explain why guys like violence more than girls.
Research has shown that testosterone, far from inciting violence, actually produces lethargy and pacific behavior in larger quantities. In smaller doses, it has no effect on social behavior. I wish CE were here, but you might search back in the threads for CElegans' posts, where she listed the exact research done, and quoted from sources.
Also... as for people who are interested in literature and play BG for the storyline, I know a total of .... 0 people. Of the people who are interested in physics, chem, math, who play BG for the storyline (and the violence,blood and gore, and they seem to get blurred together) I know.... 13
End result is that I beilieve that RPGers are normally the hardcore techies and not the fuzzies (Social sciences... >.>)
I'm not sure what you mean by "hardcore techies." That phrase is not synonymous with any scientists; I wouldn't call a geologist a hardcore techie. A geologist might also be a programmer, but the two are distinct, I think.
In addition, the people who were involved in my first table top RPG back in 1980 included a lawyer, a radio station manager, and a publicist. Of a variety of people who post in our BG2 threads, I know several are involved in the arts, at least one is a stockbroker, and two are lawyers. The market for software games, especially RPGs, is IMO simply too broad these days to be narrowly as hardcore techies.