I'm trying to come up with a guess at the most common strategy used by Blackjack players. Thus far I have:

Hit against 2-6 with <12
Hit against 7-A with <17
Split Aces & Eights only (maybe not against Ten or Ace)
Insure BJ only
Always double 11
Double 10 against 2-9
No soft doubles
No resplits
No Surrenders

I'd be interested in other's observations.