These are some of my carved pumpkins. The techniques are well described in Instructables and elsewhere (e.g. using a Dremel to cut only partial thickness), but I thought these would be enjoyed. The best part, I think, is turning the lights on and off and watching what looks like not much of anything instantly take on a 3D appearance of depth, as the light showing through the pumpkin flesh fools the eye.
I usually spend about five hours on each one, so I typically just do one per year. Finding a good image is key, and I have more fun when the subject has some emotional expression that I can try to capture, like Caesar the ape's intelligence, or Captain Jack Sparrow's smugness, or Marty Feldman's wackiness, or Norman Bates'...well, whatever it is he's thinking behind those eyes.