I haven't seen a teenage dick-measuring contest on Slashdot in a while...
It's nice to see slashdot getting back to its roots after years of corporate drudgery.
My main setup is a ThinkPad X1 Carbon. It runs Debian, relatively recently converted from stable to testing in order to keep up with more recent stuff happening in the development community. My window manage is awesome, with a minimal KDE session running underneath it. Mostly I use KDE for its interfaces to network configuration and removable media. My editing sessions alternate between a long-lived emacs session and shorter vim sessions. Both editors have been accumulating configurations and customizations over the past decade+, and I'd be awfully sad if I ever lost those. For browsing, Firefox is the main browser, with Chrome/Chromium used for work and/or random other stuff.
Hardware-wise, I like the X1 Carbon, except for this awful keyboard on the 2nd generation models. It was so bad that Lenovo reverted the redesign for gen 3. It's great for battery life (I get a day pretty easily, even as it's approaching two years old) The resolution is decent (still works ok for things that don't fully support HiDPI while still providing a decent amount of screen real-estate), and it's reasonably well supported by Debian.