Here's a supercut of Owen's marvelous 'Wow'. It should be noted that his brother Luke also tends to say 'Wow' a lot.

Hamm's Don Draper from Mad Men was the master of making you feel dumb for asking or saying anything.

Shia expresses many emotions by saying "No No No No No", especially when being chased by giant robots.

Woody has many signature stammmers including "Sheezus", "Uh", "T-This is crazy", and "I-I-I'm stunned!", but "y'know" is probably the most used word of all.

No actor besides Samuel L. Jackson can say such a nasty word and make it sound so satisfying and organic.