What do you think of them? If you listen to any of them, list your favorite song by the particular band.
Eisbrecher - Frage (Question) Rei's Theme, once again.
Megaherz - Any of their songs, they ROCK!
OOMPH! - Augen Auf! (ICH KOMME!) (eyes Open, Im comming!)
Stahlhammer - Again, any song. They all rock, but they're are not as good as Rammstein, exept for Eisbrecher and OOMPH! they are as good as Rammstein, my all time favorite bands.....OOMPH!, Eisbrecher, and Rammstein!
Cheers,
Doc.

It's most likely do to the content of your threads.
There aren't too many followers of the german music scene on these boards.

And usually it'll take a highly respected member to take interest in the thread,
or for the subject matter to be very thought provoking,
before one begins to see much in the way of replies.

As for your question, I'm big R+ fan.
I've sort of dug around the Megaherz camp, and like all of what've heard.
But I can't say I've really given any of the bands a go.