I recall Worf being in “I am Klingon, hear me roar!” mode right from the get-go. This was greatly disappointing to me, 'cause there was plenty of opportunity to explore the “nature vs. nurture” debate with the character, and it all went to waste.
Oh? The ending of the Redemption 2-part episode disagrees with you.
In my defense, I watched those episodes exactly once, six years ago.