I am a native German - but I would never ever wear Lederhosen!!
I would feel "costumed" with that typical Bavarian (not German!) garment and I would surely never be able to feel as comfortable wearing Lederhosen than wearing my Kilt.
May sound a bit silly because most peaople - not only here in Germany - would expect a German's attitude being exactly the opposite.

That said, I am just going, kilted, of course, to meet some friends for late night shopping.

Mike