I have one which isen't "positive".

Having to spec 5 chars or more. Emptying 5xbags, or leveling 5x2 professions. Its very time consuming.
Or macro 5x toons and setting up the add-ons etc.

But despite the above its still a epic win to do content on your own. Theres just something about the raw power of 5 toons I never get tired of.