Color in Ulysses' Cheeks

The Bureau of Engraving and Printing has just unveiled a new look to the $50 bill:


Source: CNN/Money

Compared with the other caricatures that grace our money, I feel that Grant has a very human face. Whereas icons like Hamilton & Jackson both appear 2-dimensional and statuesque, Grant looks a little spooked.

It's surprising that our currency would immortalize this very mortal President. How will our modern, publicly flawed Presidents find their way onto our money?