What are your favourite conversations about?

(I enjoy abstract conversations about optimistic directions for technology -- although it often involves invoking and talking about -- joking about, if possible -- all of the possible dystopias to avoid along the way. we seem to be dipping our toes into almost all of the latter nowadays, but I tend to believe that doing that also helps expose the nature of the problems more clearly for a wider audience. I also really enjoy bicycle adventures despite rarely being that well prepared for them. recently I spent an hour on a hill "modifying" a front rim to accept a Schraeder valve rather than a Presta valve after suffering a flat and bringing the wrong kind of spare innertube with me; typical)