A couple more songs from them I really like. I couldn't actually pick favourites without posting everything up here

Ohne Dich, Without You, song about losing someone
https://www.youtube.com/watch?v=LIPc1cfS-oQ
http://herzeleid.com/en/lyrics/reise_reise/ohne_dich

Wollt Ihr das Bett in Flammen sehen, Do you want to see the bed in flames, song about sex
https://www.youtube.com/watch?v=vqnk9HWbKRA
http://herzeleid.com/en/lyrics/herze..._flammen_sehen

They also did an awesome cover of a kraftwerk song.. but for some reason it has been removed from youtube. It totally rocked. But here is kraftwerk doing the original instead. It is about a model:
https://www.youtube.com/watch?v=OQIYEPe6DWY
Kraftwerk were way ahead of their time for electronic music and inspired lots of bands, I hear their influence in bands like Daft Punk particularly. Also awesome tunes.