If you're looking to meet someone "masculine" on Craigslist, here's what you might find. The Morning News features a portraiture project by photographer Chad States (warning some nsfw):
"I found all my subjects through Craigslist. I began by asking the
question 'Are you masculine?' in the heading. In the body of the
posting I talked briefly about the project. Much to the effect of: 'I
am doing a photography project on masculinity. If you identify as being
masculine, please get back to me.' I intentionally leave it
gender-neutral so males, females and transpeople feel free to respond.
Most of the respondents are men, but a few are female and a few are
trans. I posted to a bunch of different categories to cast as wide a
net as possible."
The gallery of subjects includes this chap, who looks either ready to weld and mend some pipes in his basement, or beat you to death with his wrench.
More at his website (warning: some nsfw)