Sender name should be boldfaced-- it's practically invisible
The sender's name is the most important identifying element. I glance at the sender first to see if I want to open the email.
Right now, I have to put my face right up to the screen of my 27" Mac to see the name. Not good! I want to see it in boldface.
The sender icons are pretty, but not terribly useful. Too many of them display only letters of the alphabet, which are not useful for identifying the sender (too many people with initial A, etc.)