i listen to it anytime: they all give me goosepimps: the line from her son in the opener "my fleeting Soooooooooong" just soars with beauty.
Lake Tahoe has addictive moreish melodies that the length just flies by, and Misty has arguably Kate's finest lyrical work. I see the images of her dalliance with her snowman so vividly!
But i agree with you that Aerial has a more uplifting vibe, tho' i think "morose" is a little harsh to describe those first 3 Snow pieces...melancholy, wistful, longing i'd go for.