I have a good opinion of rattlesnakes. They are the only venomous snake that gives large animals and dumb people a warning before it bites their stupid a** and sends them to the other side.
Rattlesnakes are not alone in that regard. Several snakes give warnings before striking. Almost all snakes will take a strike posture as a form of threat. Several snakes hiss as a warning and saw-scaled vipers make a rasping sound by rubbing their scales together as a warning. Cobras will hood as a threat. Black mambas and cottonmouths will display their black and white mouths, respectively, as a threat. Almost all snakes would rather warn you away than actually bite.