Slackware 13.37 - Perfect for My Laptop
Most people who have dabbled in Linux for a while "know" that Slackware is difficult to install, configure, make work and keep up to date. It is an OS only for geeks. Not so. These days the developments in the wider universe have trickled down to Slackware as well, and having something like KDE 4 as default desktop already means plenty of things taken care of, with all the utilities and options this desktop environment is providing.
The graphical X server has so far always detected and set my max. screen resolution just right, and there's no need anymore to learn and enter cryptic mount/unmount commands in the terminal. In many ways it's as easy as (K)ubuntu these days. Perhaps, arguably, with a better package manager. Keep your core Slackware distribution packages updated with slackpkg.
I've got Slackware 13.37 on a partition on my Acer Aspire 5551, with ATI/AMD HD 4250 graphics, an AMD Phenom X3 2100MHz, plenty of ram and Broadcom wired and wireless chips for network connectivity.