I'm pretty sure that our leopard gecko is a regular "eclipse" (one completely black eye/iris; one normal eye) and she is fairly pale under normal circumstances, however, she definitely gets quite a bit paler/duller a day or two just before shedding. She has a yellowish-to-beige colouring along her back and a somewhat translucent pink underside. Here's her normal colouring, as well as the eclipse eyes:
Colouring
Eclipse eye
Normal eye
Keep in mind that the colours in the photos are affected by the lighting. The top photo was taken with a camera flash & basking lamp illuminating her vivarium (which tends to give a warmer/yellower look), while the bottom 2 web cam photos are illuminated by the fluorescent UVB bulb which is whiter and tends to wash out the photos.
Here are a couple of videos showing her normal colour and another of her shedding that shows how much paler she gets:
Mushu Eats Another Wax Worm - YouTube
Mushu Sheds Her Skin - YouTube
As for the shedding process, I noticed a little skin tear on her nose in the morning before going to work (at 8:00 am). From some of my video evidence, it seems that they tend to scrape there snouts to try to get the skin to start peeling back and once the skin gets past their head the process is quite quick. By about 1:00 pm, she was in the process of removing it from her body (as seen in the video) and it only took her about 10 minutes to completely get the skin off and eat it.
As for appetite and drinking, I can't offer you any specific information. Prior to installing the web cam, I don't think I ever saw her drink but now I know she drinks quite regularly when I'm not around or when I'm sleeping.