Great post here, I’ll definitely revise my profile a bit from reading here!
Not all of us are professionals, so as a hobbyist, I find adding “favorite resources” (books, websites, etc.) to be a bit more useful than links to publications which demonstrate expertise in the area.
Beyond that, I value folks who interact in comments when identifying or who respond to tagging (@) more than credentials. They seem a bit more passionate or maybe just a bit less busy, I’m not sure.
Maybe a more quantitative measure of expertise is looking at one’s mavericks and putting in a link for those in one’s profile? Someone with pages of maverick IDs maybe doesn’t have as much expertise as someone with a handful?