DM Skills

I came across this post at Symptoms of Radness about DM Skills. Finding it pretty cool, I say I'm doing it:

STR: 10
INT: 8
WIS: 17
DEX: 13
CON: 15
CHA: 10

Yes, maybe these scores are not that accurate, I should ask my players. By the way, I think I'm good at improvising (being the lazy guy I need to be good at improvising), though I'm not sure I understand the Constitution meaning that good. As for Charisma, I like to give all my characters (and monsters) different voices, but I feel as if I go too much on stereotypes (ya know, The Old Taverner, The Godfather, The Tough Warrior and so on.) So why Superman? Hell everyone loves Superman.