Is there any good reason to not roll a new toon for each class?

[Zakalwe]

I finished bringing up a second character to cap just last week (White Mage) who will house my DoM classes. My original, Zakalwe, is my cap Paladin and will house my DoW classes.

The only real inconvenience I've noticed so far is no insta-DL gear on hitting cap. And similarly, no access to any greed rolls from my PLD, who has lots of extra Ifrit/Garuda weapons from when he farmed them on and on and on hoping for a replacement for his GC green sword, before giving up and moving on to Titan.