In my area, short range public transportation is the most depressing thing in the world. I have never used a bus nor will I ever. I get up pretty early for work. Most of the year the sun is barley out or not even out when I wake up for work. Anyway, this allows me to see easily into buses and everyone looks like they are about to shoot themselves.

Other kinds of public transportation is tolerable. Flying or taking a short or long train trip is no problem, nor carries a depressing vibe to it.