Fedora is backed by RedHat, the 2nd biggest Linux kernel contributor in the world. Using a distribution made by RedHat means that it will be fine-tuned to work as efficiently as possible since it's made by the same people who work extensively on the kernel and know its ins and outs.

By using bleeding edge software, Fedora allows for innovation to take place by testing out things which other distros are not willing to try due to fears of having instability issues.

It perhaps has the best integration with GNOME (GNOME software works out of the box).

Spins are images with a different WM/DE, and Labs are filled with a specific theme of packages.

Latest version software often means quick bug fixes, more useful features. It's useful to be able to use recent external hardware such as USB wifi dongles or printers.