The biggest issue I have with multiple currency's is ... Weight of coins. Not sure if any of you noticed, but your coinage weighs, and if you are playing a class with low strength that weight matters. If I had to deal with copper, silver, gold, and platinum... I would be trying to convert most of that to the higher denominations for weight savings alone. On the positive side it could bring up a nice RP issue... when some NPC says.. "I don't have enough change for that gold or platinum piece" and that's all you have to pay for it with. But that also could be really annoying for some players as well, as they have to micro manage their finances which can take away from game enjoyment.
