Pop Quiz Hotshot
One of my personal favourites
If it wasn't for Easy Rider (1969) that he directed, co-wrote and co-stared in, then there would have been far fewer cool, influential and rebellious American movies and maybe fewer cool European movies that Hopper himself was inspired by in his approach to making Easy Rider and then in turn inspired them back.
Cowboys on wheels!
Through his work from Rebel Without A Cause (1955) to Easy Rider to Apocalypse Now (1979) to Blue Velvet (1986) to Speed (1994) you can see an understanding of the other and dark side of modern culture both in terms of character, time and place.
Apparently he has a sick art collection too...
God bless Dennis Hopper!