Tricky winterlight

Wow, it's trickier than I thought: trying to make gorgeous pictures. I'm a big lover of natural light, even in winter. It's lovely and filtered but... not so great for taking pictures. I've got lots of light in my studio coming from several directions. Would be enough, you think. But no, even though I'm setting my own white balance and fiddling around with ISO and shutterspeed, they still come up dull.

So long life photoshop! Here's the result... good enough?