I don't listen to depress myself either.  Quite the opposite actually.  I think most of the lyrics that aren't happy actually help me get through any bad situations I might be in.  Swim is a great song, it's just takes a lot to get used to it since it comes after so many "not happy" (in terms of riffs) songs.  I don't know, maybe Wayfaerer is in the same boat.  Oh well, not a big deal.