I could not take the Klingons seriously until Star Trek VI -
In the 60's shows they looked like Indian dudes with goatees
Also they speak alot of english and not klingon amoung themselves in this
He was great. I've always thought of him as one of the smartest Klingons. He might not have the brawn of the others, but he's managed to get to the position he's in with his cunning and smarts.
I agree he was tremendous. I think he gives one of the best performances ever in a Star Trek movie; for example, folks, check this, remember his read of the line "Yes! It's exhilerating isn't it!"