I find I can solve problems better when they are laid out on a board with stones, and I like replaying games with board and stones. I carry a small book of go problems with me in case I have to wait in an office or someplace.
This is a bit OT but in general I prefer things in real life rather than via the computer. I moved to a new city once and had to find a new place (club) to play go. I was told a location and I'll never forget the happy thrill, when I walked into the building and heard the familiar sounds of a go club in action. I don't get that thrill of anticipation when I log onto a server.