Haha, I really love the name Rüdiger! I've given the name to one of the characters in my novel. I much prefer it to Roger, its English cognate. Plus, Rüdi (or Ruedi) is a cute nickname!
No offense to anyone, but this is easily in the top 5 ugliest and most embarrassing names ever. I can't believe Germans have actually named their infant sons this back in the day. The name sounds like that of someone born a hundred years ago, and it has the sound of the name of a hopelessly nerdy boy from the 1910s who had funny clothes and silly glasses.