This is a serious question, and not one inviting cheap shots.
There would be more discussion of football and rugby (fair enough) and probably golf (yaaaaaaaaaawn).
There would be a Cars section. Like them or not (and I don't especially) more men are into them than women.
I imagine there would be less bitchery, and not as many all-encompassing comments like "all women are stupid."
There woukd be a dedicated Music section for discussing our ALPHABETICALLY-arranged (is there any other way?) CD collections.
Any more??