Is is possible to set a default PDO fetch mode?

Before I retrieve data I always have to type:

$STH->setFetchMode(PDO::FETCH_OBJ);

In the interest of making my code more readable it would be great if I could set a default mode somewhere....

Thanks!

Edit. I was originally hoping I could add PDO:FETCH_OBJ to the setAttribute code I run when I connect to the DB, but that doesn't seem to work...