Round Robin would be pretty tough to implement because you need to track who looted last and figure out a way to communicate that with everyone...

I just swap the characters regularly... one day I will have my tailor loot, next day I will have my scribe loot, etc...

I could remove the restriction that allows only one toon to loot an item, that way it would be a race to see who get there first and gets to loot... but unfortunately it wouldn't necessarily be random or 50/50. For instance if one toon is melee and the other is a caster, the melee toon will almost always get there first and would thus, almost always loot the item.

and I think lag / key broadcast software could impact it as well... ie, due to the way the key broadcast systems work, the interact with target commands get sent down to the other windows in the same order (I believe) so the window that gets the command first is going to start moving first and thus get the item the vast majority of the time...