King's customizations sucked in Tekken 6.
Tekken 5 was great because you could give him Armor King's mask.
But other than that, I never saw any reason to change his black robes for any of the lesser bullshit. His wrestling attire I just switched out for his Tekken 2 shit (business shirt & tie).
Feng though? They had better keep his shit from 6. My Feng is unmatched in badassery