I think I would go insane with commit messages like that. Sorry, but they have very little value - I'm afraid that it's not important to know that you've gone out for a meeting, a coffee or sick. Commit messages in a mainline tree should be reserved to explain what you've done, and nothing more.

I would hate to have done a bisect to land on your commit "WIP, heading home sick for the day" as the one that caused the bug. By all means, create a WIP branch and if you can then push this WIP branch to the main repo, but please use commit squashing into logical units of change when merging into the feature branch or main trunk!