I would just prefer if each spell was either aoe or not aoe, like in FFXI. Like Fire vs. Firaga.
It's tiring and time consuming to be hitting macros or typing /aoe on/off all the time, while I could be using that time casting.
As things are I have to have 2 macros, one to turn aoe off and one to turn it on. I can't just put it into the spell macro because sometimes I may want an aoe elemental spell and sometimes I want single target.
Sometimes it just becomes more trouble than it's worth and I just stick to /aoe off, but because of that I feel I can't reach my full potential.