Its not about more storage space. For a lot its about alts I'd think as it is for me. Sure I can do everything on 1 toon but I'd still prefer having different toons and not have to level crafting on all of them for what I need. Since I started I envisioned myself 1 heavy male melee / tank type toon, 1 light spirited female bard/archer type toon, and 1 female elven sort caster type toon. The goal as with many for crafting is making stuff for their own characters including alts yet this is ruined completely as you can't even mail crap to yourself. Its an easy fix but as usual Devs in MMO's don't really listen to players. And all those spammers they are trying to avoid just spend random tells to people anyways. I get them relatively frequently.