That's not true. I love the warm weather - and absolutely dread overcast/rainy. I don't have Seasonal Affective Disorder, but to say that the sun doesn't brighten my day would be wrong.
Seattle is closer to Hawaii. I've found Seattle to have acceptable sun by spending a few weeks out of the year vacationing to Hawaii or California. Summer in Seattle is so much better than Summer in Texas; it's the rainy winter that you have to break up.
It's all relative.