[Komodo]

[ QUOTE ]
Sklansky did in his essay the Eight Misktakes in Poker that is part of his book getting the best of it.

1) Calling when you should fold.

2) Calling when you should raise.

3) Folding when you should call.

4) Folding when you should raise.

5) Raising when you should fold.

6) Raising when you should call.

7) Betting when you should check.

8) Checking when you should bet.

[/ QUOTE ]

LOL
true, but this is not concrete enough to say anything.
Also this is pretty much everything you can do in holdem, so it doesnt tell which is more common.