I guess I have a slightly different understanding of what "natural" skin care means, than what's been said on the thread so far....I grew up using a lot of natural ingredients directly on my skin instead of having them in lotion/cream form (ranging from coconut/olive oil for head massages, to Fuller's Earth/cucumber for face packs, to applying the pulp of papayas and other fruits to my skin to make it less dry). Even the face scrub I use in place of soap now is a homemade concoction. And I try to do a rosewater wipe whenever I can.
I know it sounds all holier than thou, but even though it's been great for my skin, it happens to be rather cumbersome- this stuff takes time, and lots of time. Apart from the scrubs and wipes which take only a couple of minutes to wipe off, it's just not doable on a daily basis, which is why modern skincare is necessary too. I use products from a line called Biotique, which work fine for me because they're light in texture and hypoallergenic, but ultimately it's important for your skincare routine to be something that suits your life. If what makes my skin feel best is a Shiseido moisturiser, I'm not going to refuse to use it because it isn't "natural". And even though moisturising is important, I still think what you put in your body is far more important- getting more green vegatables and drinking lots of water might go a much longer way towards keeping skin 'good' than any external skincare ever could