It allows me to have all the flexibility I need (the perfect world between stability with only legacy packages or recent ones on a constantly broken system; as in Gentoo, you always have choice) and it teaches me so many things each day.
* [Dreamplug]: latest public Grsecurity kernel 4.9 (before, I used precompiled kernels from [Xilka]);
* [Cubieboard 2]: Linux 3.4 [custom branch](https://github.com/cubieboard/linux-sunxi.git) for Allwinner A20 (dual-core ARMv7 Cortex-A7 and Mali400 MP2) + upstream patches on 3.4 not merged in the Allwinner tree;
* [Odroid-C1]: Linux 3.10 [custom branch](https://github.com/hardkernel/linux.git) for the Amlogic S805 (quad-core ARMv7 Cortex-A5 and Mali450) + upstream patches on 3.10 not merged in the Hardkernel tree;
* [Cubox-i 4x4]: latest mainline kernel, currently 4.16, running OpenGL applications through etnaviv driver;
* [Creator CI20]: Linux 3.18 [custom branch](https://github.com/MIPS/CI20_linux.git) for the Ingenic JZ4780 SoC + [upstream patches](https://github.com/nemunaire/CI20_linux.git) on 3.18 not merged in the imgtec tree;
* [ThinkPad X250]: latest public Grsecurity patches on 4.9 kernel.
* [Orange Pi PC]: latest mainline kernel, currently 4.17 on headless server.