Genderswitching Classic SF

Inspired by this lighthearted Guardian article on Genderswitching classic novels, my holiday challenge is to take a passage from classic speculative fiction (define as you like), and reverse the gender of the pronouns (or otherwise subvert, if you want to make your hero genderqueer, say). What's the most fun you can have? What SF story would be the most changed by the subversion of its genders? Which would be improved?

A couple of ideas to get us started. First (from Honor Philippa Lovecraft's Call of Cthulhu):

The first half of the principal manuscript told a very peculiar tale. It appears that on 1 March 1925, a thin, dark young woman of neurotic and excited aspect had called upon Professor Angell bearing the singular clay bas-relief, which was then exceedingly damp and fresh. Her card bore the name of Henrietta Antonia Wilcox, and my aunt had recognized her as the youngest daughter of an excellent family slightly known to her, who had latterly been studying sculpture at the Rhode Island School of Design and living alone at the Fleur-de-Lys Building near that institution. Wilcox was a precocious maiden of known genius but great eccentricity, and had from childhood excited attention through the strange stories and odd dreams she was in the habit of relating. She called herself ‘psychically hypersensitive,’ but the staid folk of the ancient commercial city dismissed her as merely ‘queer’. Never mingling much with her kind, she had dropped gradually from social visibility, and was now known only to a small group of aesthetes from other towns. Even the Providence Art Club, anxious to preserve its conservatism, had found her quite hopeless.

And second (from Wilma Gibson's Countess Zero):

She’d come home and gotten right down to it, slotted the icebreaker she’d rented from Two-a-Day and jacked in, punching for the base she’d chosen as her first live target. Figured that was the way to do it; you wanna do it, then do it. She'd only had the little Ono-Sendai deck for a month, but she already knew she wanted to be more than just some Barrytown hotdogger, Bobbi Newmark, aka Countess Zero, but it was already over. Shows never ended this way, not right at the beginning. In a show, the cowgirl heroine's boy or maybe her partner would run in, slap the trodes off, hit that little red OFF stud. So you’d make it, make it through.

Do either of those change the reading of the story significantly? Please add more examples in the comments.