Originally Posted by Jay_Drummond
This can be tricky in that your home directory has a lot of hidden files in it that are application specific.
To be honest, those files are one of the main reasons why you would want to preserve your /home. Most of them are configuration files for apps, and by moving them to a new distro, those apps will retain the customizations that you've done on the old distro. I don't know about you, but not being able to preserve stuff like that is one of my main beefs with Windows.
And if the app isn't on the new distro, the hidden files don't do anything other than take up disk space.