Even though I've grown up in Germany sometimes my German sounds like I had been here for just a few months.
Looks like most of the german native speaker are doomed to gradually lose the ability of speaking proper german. :P
Anyway I would rather like to speak/write better English than German.
German is just limiting the number of people you are able to talk to.
Of course it's important for a nation to have their own language.
The language is always a part of a nation's culture and history and also important to identify yourself with your people.
But for people like me who aren't that gifted in learning languages would really appreciate have to learn just one foreign language and not two
(or sometimes three if your mother tongue is as much as familiar to you than languages you've never heard of before.)
But that's just my opinion..