I'm a regular user of wikipedia, often using the site to discover background information about the subjects of news stories, blogs &c.
I compulsively correct errors and stuff I find when doing so, and often expand articles if I find them to be missing mention the current event that led me to them.
I have no special sphere of interest with respect to wikipedia - I just help out with stuff I can.
Note to self: the popup delay of hovercards can be set here as described here.