Obviously a very sociable snake. It's probably enjoying the warmth of your hand.
Caught in Anderson... I think it's an Eastern Garter, but no picture shows the bright orange under the scales...
Looks like a nice friendly one. Those guys normally poop all over you when you catch them.
I kept a garter snake about that size for my kids for a while when they were younger. We'd put feeder goldfish in his water bowl and he would repeatedly dive head-first into the bowl until he caught one, and then he'd swallow it head-first and dive in for another. It was fun to watch.