I love the look 10,000K gives me. It's not blue at all, but definitely a nice colored white. It's not pink like many lower-spectrum bulbs, which is a big plus for me.
I have a 20,000K bulb also but it's making my swords fade compared to the ones under the 10,000K. (No wonder...But I don't have any other HQI, so it's the winnar until I score an old 10,000K one.)