I'm further out of Williams than you, and I still feel that it had a pretty large impact on who I am and what I do. It's there I decided to be a composer, and started learning how to be one...and most of the people I spend time with I'm connected to through Williams, directly or indirectly. In terms of my worldview, I was always pretty liberal, though perhaps Williams made that a more considered stance.

I'm a few years out of grad school now, with a Master's...and looking back, though I was certainly glad to go to NEC, I feel that I could have had that experience anywhere, that graduate school was more about refinement than definition the way college was.