While it would be totally awesome to have something like Kael's orbs (which aren't quite soul shards, more just magic amplifiers IIRC), I hope there's a way to disable them outside of combat. RPing a Noble of Stormwind is a little hard with three GLOWING ORBS OF DEATH around her head, even if she is wearing Mooncloth robes >.>
I like it Not too flashy, but visible enough to add a bit of flare.