"Monogamish" is probably a better description. My girlfriend and I are ostensibly polyamorous, but mostly we're just busy.

A significant proportion of my OKCupid matches were polyvangelists back when I was still quite skeptical of it. A couple of years ago I went to a "99% Party", where the two hosts (themselves 99% matches) invited all their 99% OKC matches, and each guest was allowed to bring a 99%-matching plus-one. That was a surreal experience. There was obviously some selection for extroversion and people who could turn up to a stranger's house in Islington on a week night, but I learned that my OKCupid matching-space neighbours were a lot more pro-poly, soapbox left-wing and literary than I was.