I like Volleyball better than Rugby because it's more novice friendly. Anyone can just join in and play without having to learn too much and be afraid of getting hurt. (Of course, you can get a smash directed at your face, but in Rugby the physical violence is pretty much encouraged so that does put a few people off of it compared to Volleyball.)
you do realise all you need for Volleyball is a net and a ball.
And that's what makes it great - the ability to set up a play area almost anywhere. You just can't do that with Rugby.