Having more than one character, what's the point?

[Mirage]

With the new pricing system for 2.0, we're going to be able to have upwards to 8 characters on a single world. My question is what the point of having more than one character in a world would be, from a game play perspective. The character wouldn't keep any of the levels, meaning that all of your job levels will be dispersed between several characters which would lead to inconvenience right? The only benefits I can think of would be the different race (which I find a bit of a small incentive considering the sacrifice of the levels from your main) and as a mule I guess?
Just wondering what other people's thoughts were, are you going to make a secondary character? And why?

Storage

Different characters for melee and magic

Play as a different race/gender because you like looking different than usual.

And lastly, having access to 8 but wanting to use only one doesn't affect anyone. Having access to only one but wanting several however, affects everyone who likes to have more than one character. It has a minimal impact of the storage space needed for the servers, so why not?