You can't beat a mouse and keypad for the first-person shooter, MMO and strategy genres. There are, however, some games where using a gamepad can not only be preferable, but essential. A great deal of modern titles are created with console controllers in mind; meaning that when they appear on the PC they can sometimes be unplayable via a mouse and keyboard. A gamepad is a required purchase for someone wanting to get the most out of their PC gaming experience. There's plenty of choice available, from a variety of companies, although most people opt for a Xbox One or PS4 controller. A lot of thought went into the design of the next-gen console's joypads, which is why they're considered the best.