Hiding in a sweater sleeve and sticking their head out is like hiding in a warm hide and sticking their head out. They're really just looking for security and warmth. But that doesn't mean they can't learn to associate you with security and warmth, so ultimately, still a cute thing! And watching them inspect their environment, booping their noses on things, is also adorable.
But they're not cuddly creatures for enjoyment, in the end- meaning that owners shouldn't have the thinking of "the more interaction/cuddles, the better!" like a dog or cat would. That kind of thinking can cause issues down the line for the snake.
In other news, I just love seeing them poke around and inspecting new things!