Keyboards
Start with the practical stuff: layout, language and stock. ISO-DE or ANSI matters more than case color; 65/75% saves desk space, TKL keeps navigation keys, and full-size keeps the numpad.
After that, choose the feel. Low-profile boards are closer to a fast laptop setup, hot-swap boards are better if you like experimenting, and magnetic HE boards make sense for games where actuation settings matter. NuPhy and Lofree lean slim and wireless, Varmilo is the safer ready-out-of-the-box pick, and AKKO/MonsGeek usually give you the most features per euro.