What're the top 10- biggest whitewater rafting rivers in the United States?

Question

What're the top 10- biggest whitewater rafting rivers in the United States?

Answer 1

A lot of differing opinions, as you can see from the "best of" lists below.  Most every list includes the Gauley river, the Salmon river, and the Colorado through Grand Canyon.  

Keep in mind that the "Best" river can change - water flow from snow melt, dam releases, drought can affect the action on the river quite drastically.  Low water can expose lots more rocks and obstacles - and can be really dangerous, or it can create more wave trains and fun.  So the "best of" lists or "top 10" lists are really subjective.

Have fun!