This forum seems kind of lonely, so let's get some conversations going. I currently run the same distro on my laptop as I do my desktop, that being Gentoo 2006.0. I used to run SuSE 9.0 until 10.0 and simply didn't work on my Dell Inspiron 5150. Overall though, Gentoo is obviously quite scalable, so I don't need half the junk SuSE throws in.
I run Gentoo on mine as well. When I first got the laptop I needed to patch the kernel etc to get sound and acpi working right and I found Gentoo to be the easiest for that. Now it works in all the distros that I have tried, but I have become very accustomed to Gentoo. Lately the time necessary to update that computer has become a little bit of an annoyance. I may switch to Ubuntu when Eft is released. For now Gentoo will stay on it though and I have no plans of taking Gentoo off my desktop any time soon.
Running Slackware 10.2 on an old 450MHz laptop. The cdrom fails randomly and will stall during reading in longer periods, so I had to install the absolute minimum of the distro and fetch the rest of the packages through the network after the cd installation.
I use Ubuntu on an Acer Travelmate. Love it, especially since the Dapper upgrade. Everything just works, feels very polished.
Oddly enough, I don't really like using Ubuntu on my desktop PC. I'm running Arch right now, and quite enjoying it. I used to like Gentoo a lot though, until updating portage database began taking half an hour......