Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Brian Proffitt recently tackled the topic of distro-hopping over on LinuxPlanet. Proffitt wonders whether the practice might be passe or something to be discouraged, but it's here to stay and should be encouraged rather than looked at askew.
Looking through the lens of an IT professional, whether that's a system administrator, tech writer, developer, or working in IT marketing, it's a really good idea to have an accurate view of the landscape. And you don't get that by jockeying only one distro all day every day. What I've seen happen to all too many users is a sort of Linux myopia, where the realm of what's possible is scoped to only one distro, and the understanding of what's available is dialed down to what's available in the user's chosen distro.
For most of the time that I've used Linux, I've switched distros at least every six months. It's doubly important for contributors who participate in FLOSS projects, especially distro development, to have a good hop now and again. Cross-pollination is one of the things that make open source great. Without frequent and repeated exposure to other distros and software, it's too easy to get locked into the idea that there's One True Way.