My girl's the same way. I only let her out on my bed, but she's always cruising towards the edge of the bed or trying to squeeze under the pillows or covers. She doesn't seem to mind being held, but she doesn't like the initial getting picked up out of the tank. But once she's out she's always periscoping and sniffing around.

She does seem to recognize familiar scents though. She's climb all over my boyfriend and I, but with new(er) people she'll sit stock still and flick her tongue like crazy to figure out what's going on. We think she's attracted to higher body heat, because she'll beeline to my boyfriend and curl around him because he's always toasty warm. Each snake has its own quirks, just like any pet.