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

[Allyra]

Eh, play the way you want in my opinion.

While it is probably less convenient in the long run to have things across multiple characters vs just one, sometimes it is nice to have different races/genders/etc for different classes to spice it up.

^this

Best way to do it is to roll a toon for MNK/DRG/BRD, WAR/PLD, WHM/SCH, and BLM/SMN.

and this ^

It takes awhile, but having multiple toons (keep qqing you youngsters, toon goes all the way back to UO) can be nice, especially when you have more than 7 friends (shocking, I know.)