Rattlesnake is good, havent eaten it in several years now. I used to catch them, cut the heads off (in the south) skin them, and cook them (or have someone else do it).
They are easy to catch if you know what your doing, easy to carry alive in a bag, and easy to prepare.
The last few I had were up north here. They were huge (4-5ft and one much bigger), there is a photo floating around the state of Ohio with me holding a 6ft plus rattler by its tail over my head, and its head is resting on the ground (taken in the mountains of PA).
Im a reptile collector and used to get rattlesnake permits every year but lost interest. In PA they are a protected species.
I dont kill every rattlesnake I see (only a few selectively), they are an important part of the the ecosystem, in many places aside from a few bobcats left, and coyotes, they are the top predator left.
Most we caught had pictures taken then released right away. We had to turn in reports every year on the size, sex, weight, location, scale counts, etc on them (females are bigger, males tails are longer by scale count before the rattle).
A good friend and I taught a reptile education show for schools once, he had several venomous snakes, and hundreds of non venomous snakes.