I'm amused by the concept behind the "levels" progression: What does it mean to be human? (or elf, or dwarf, or whatever) Spending months exploring the racial elements of your life, not really pursuing a career or class.
"So what did you do today, Bri?"
"Well, I got in touch with my humanity and worked on developing some of the many skills that define what we are as a race."
"Yeah, they say Krunk is doing the same thing with his half-orc heritage. He's really getting into the entire 'angry misplaced outsider' thing."
It's ... humorous.