We have a guy with a mechanical keyboard on the team. After a while people just started muting him in Hangouts. It's not even the mechanical keyboard itself that's the problem, but the way it interacts with whatever noise-filtering algorithms Hangouts runs.
I'm growing to like them too; I'm not using one right now, because of issues on my Linux desktop (my xmodmap settings keep resetting every couple minutes), but maybe one day I'll buy a better one or solve the problem with the (cheap) one I have.