When we moved to Portland five years ago, it was with great reluctance on my part, because I was convinced that I was going to die from depression. I think I still carry those low expectations with me, because every winter I'm still surprised and delighted every time the blue sky peeks out (which I'm pretty sure it does at least once a week). My colleagues tell me that ten years ago, it was grey for the entire winter, but that hasn't been my experience and I love how green it is here as well. Though I do feel that I'm sheltered from some of the grey when I'm in the office all day in the winter-- maybe if I were FIRE'd and at home, I'd feel it more strongly.
My Seattle friend is convinced that both Seattle and Portland are grey, but that "Portland is a lighter, brighter shade of grey". Austin would get these heavy clouds that felt low and oppressive, and I've never felt that here. Anyway, if you can't stand the weather, then I see no reason not to cash out on your home's gains and find another place to live!