I find that Porcupine Tree fits well with my mood in autumn/winter. Not quite despaired nor really happy. Just contemplative, serene, with the occasional burst. Then again I may be totally bat**** loco and/or be over interpretive.
"Know what you're trying to do before you do it. Turning knobs at random isn't enlightening any more than throwing paint at a wall blindfolded will let you paint a nice picture."