I'm a stats junkie, and it always kind of bothered me that I wasn't getting a lot of Author Profile views at EZA. I never figured having an author photo was a big deal. Boy, was I wrong! I added one a few months ago (after going over 3 years without one.... D'oh!), and since then I've seen a big increase in the number of profile views as a percentage of total article views.
You might wonder why that matters. Well, if you play it right, profile views can be a nice secondary source of traffic/leads. Obviously, your resource box links in each article will be the prime traffic senders, but your public profile can also add visitors.
I don't have exact numbers handy, but a conservative estimate is that I've seen about a 50% increase in profile views since adding my photo. It's definitely worth doing.