I'm going to admit never to have owned a laptop untill early this year.
Found it to be a very usefull thing. Still lots I do with the desktop because it's the htpc and all. But for basic tasks, checking email etc., a laptop with a 14-15" screen is great. I can also run mine completely off solar my power system. That won't happen with the desktop, 2 monitors & a 37". Heck of a difference in footprints.