Without a gravatar, you’re a faceless name in the crowd.
You wouldn’t show up to a first date wearing a disguise, would you? Or wearing a plain paper bag over your head?
So why would you choose an image of Grumpy Cat or Ron Burgundy to represent you in blog comments? Or settle for the faceless silhouette that screams generic nobody?
Instead, let people see the real you.
They will be far more likely to feel a connection with you if they can see your face.
Besides, you know you’re sexy. Show us that smile!
Tip: If your carefully-crafted message is somehow flagged as spammy and held in purgatory (aka comment moderation), a gravatar increases the chances the blog owner will approve your new comment.