A guy is great friends with a girl on many levels, save for anything intimate. Possibly the best 'zone' to be in, as a male.
The guy is privy to many a little known facts.
She'll give him a hug if he's down, not just because he got her flowers.
Emotional support is usually mutual, and beneficial.
Best part: You will never fight. As friends, one of you will say something silly or with innuendo, and it'll be back to normally conversation.
George: Bro, I'm so happy to be in the friendzone with Cathy.
Lucas: WTF man? That means you'll never date her or get shit!
George: Psh, I don't care. I can play games with her anytime, we joke all the time, never fight, and hang out so often!
Lucas: Man, you be tripping. If you aren't getting booty, you have no reason to be up in there.
George: Got it all wrong man, the Friendzone is the place to be.