How do you know? Tell me why u love it
Customizable, Open source software. Not only free, but you can see the code to make sure it's not doing anything malicious, or full of security holes. Much more secure design. Can be as minimal or as bloated as you like. Better performance with less wasted resources. Software is installed via package managers, everything is held to certain standards. Upgrades and removals are a snap.
Companies and individuals choose Linux for their servers because it is secure, and you can receive excellent support from a large community of users, in addition to companies like Canonical, SUSE, and Red Hat, which offer commercial support.