I sort of know what you mean re some of them! But it's a highlight of a visit to anyBundesliga stadium, especially with the flags. It's why I'd love Albion to get drawn against a German side -- Freiburg or Leverkusen.
In Germany, every club has an anthem. I'm biased towards Freiburg's as I was a season ticket holder there but Cologne (Köln) was probably my favourite. I travelled up there twice, the second time really just to hear the fans singing. It's absolutely heart-stopping when you're in the stadium...