I miss the wonder and awe and naivety that all of this programming is leading to something better socially/politically or for lifestyle. In many ways it did. It also may have created more problems than it solved.

Also, I miss the joy of learning all the deep features and idiosyncrasies of a computer - its instruction set, I/O routines, timing and interrupt tricks, etc. These days I am focused more on Big Hairy Goals and complex systems. Fun of a different sort.