Pity. I'm pretty good at many of the things (and work habits!) you mention under Skills but I don't do my own Ajax/PHP coding.
As far as this is concerned - "a designer who understands what looks good and what doesn't and how to fix it" - I've never done anything else.
But usually the customer insists on drastic changes which spoil the end result so there's very little completed work which I'd ever approve for my own CV!