The advantage of using Gentoo for me personally is the insight into the operating system and total control it gives me. Also, I think the packaging system (Portage) still is unmatched (I have tried a lot of distro's in the past). Other distro's tend to hide stuff from you using GUI's and what not. There's nothing wrong with that, it's perfect for people who want to get started with Linux right away. But, if you want to know exactly what's going on under the hood, give Gentoo a go
