you'll be missing out on quite a few side benefits: pictures of your face in the SERPs
Is that really intended as a benefit? The other day I did a search-- a real search, not testing anything-- and the second hit came with a photograph of the author. Frankly I thought it was creepy.
Somewhere on the horizon there's a whole new crop of studies. Which faces get the best click-through rates? Do authors of some particular demographic have an advantage? Does it depend on what you're searching for? Is there a relationship between searcher's demographic and preferred author demographic? Depending on site content, should I let myself be impersonated by my daughter the aspiring model or my father the retired math professor?*