Dennis always answered his emails and was very humble in the light of most
of the UNIX guys holding him in god like status. I remember he'd sit with
us in the lobby or cocktail lounge or by the pool at the USENIX meetings.
Just happy to be hanging out with the rest of us. One year, while I was
working for the Army and we were getting a lot of internal pressure to use
Ada, I made a bunch of t-shirts up that had Ada Lovelace with a big red
circle/slash (NO) on it. I pointed out that at the time there were several
government projects to write internet routers contracted out and all
mandated Ada. I developed one in house at the Army and wrote it in C (it
also used media with UNIX boot blocks on it).
I gave Dennis one of these shirts at a conference. I saw subsequent
pictures of him wearing it.