I'm proposing the addition of another check box on edit pages, next to "This is
a minor edit" and "Watch this page", a "Watch this page temporarily" box.
Checking the "Watch this page temporarily" box would put pages on a user's
watchlist for a few days, say 5 for example. This is because often when leaving
messages on talk pages or on user talk pages, etc. you just want to watch the
page for a few days to wait for a response. After a few days, the page would be
automatically removed from your watchlist. What do you think?