Ahhh, multiboxing... everyone has an opinion on this! I don't really mind them any more. To each his own, as long as they are not cheatyface exploiters.
I two-boxed for a while in EQ, when being a high end Cleric only required two buttons: sit/stand, cast complete heal - I ran my rogue around and eventually collected all that glorious haze panther armor, while my cleric Bhinder patiently sat on his pony, ready to patch me up.
Later, Clerics got a WHOLE LOT MORE FUN in EQ so I traded back and forth with which character I played.