So, I like looking through ancient threads, and I stumbled across this one.
Thought it was interesting. My 2c is that You is better, because there's no name duplicate filter (i.e. there are 3 Cupcakes) so if you were playing with another Cupcake (or in other people's cases, striatic, yeoz, etc) it could get confusing.
People with 'You' in the name (such as player 'Young Leek') used to get shown as red!
Having 'You' doesn't bother me. But what does bother me is that 'you're' and 'your' get shown as red in every mention in Local Chat notifications... just the first mention of 'you're/your/you' should be red IMO.