Arch Linux on a Macbook Air 4,2
Installing linux on a laptop, especially an Apple laptop, can be a frustrating experience. While the initial setup still isn't trivial, a pure EFI-boot copy of Arch Linux is by far the most straightforward install I've done. No mucking around with BIOS/MBR, experimental Xorg drivers, unstable binary-blob Wifi drivers, or complex suspend/resume scripts is required!