All those big constrictors can really tear you up bad. Dozens of long recurved and super-sharp teeth. I know a couple of guys who specialize in big constrictors (retics, burms, etc) who have had extensive plastic surgery after bad bites.
Still, better than getting tagged by a venomous snake, I guess. But I prefer my "little" rattlesnakes - never was much into the huge snakes. They eat and shit too much.