There are programs that get installed with defaults that annoy me day after day, but I never care to do anything to fix the configuration files across all the boxes where I use it.

For example, emacs in Debian creates stupid backup~ files by default, which after a while accumulate in my homedirs.

It's so cool when these backups I always grumble at save 2 hours of work, after misstyping “rm” instead of “less”...