Experience helps
It's been about 6 years since I've been in a play. I was pleased, therefore, to discover that with time and life experience comes a better awareness of humanity, and by extension, a greater ability to find the humanity in my character. I was surprised at how quickly I came to an understanding of who my character is, and his relationship with most of the other characters. (Credit also has to go to Laura's excellent and efficient direction!)
Now I'm ready to start figuring out how to communicate all this to the audience.