Something I thought of that I think blizzard should consider, is an invisible peice of armor for all classes.
Have you ever noticed in some of the trailers and artwork for some of the races, for example, orcs and tauren, they fight without any chest armor. I've always thought this would be kind of cool, such as having a savage orc or tauren warrior or shaman fight this way. I've even ried to find armor to suit this, but things such as harnesses don't work for plate or mail wearers.
To that end, I recon it would be kind of cool to have something, perhaps at the darkmoon faire, armor peices for all armor types that appears invisible, doesn't have to be for all, but for chest, bracer and gloves.
To this, it could also have us fight in some of our favourite shirts without armor covering it, and what I suggested a while ago, make a tattoo service to show cool looking tattos on our characters, which we can show off with this option.