On the whole of my six-months of local experience, southern Germany is, for the most part, very similar to the US I think; with a few very notable exceptions:
*Here, wool is an all-season fabric. Even on the warmest days, when I am sweating in shorts and a tank-top, you will still see some people in sweaters and jeans. Parkas are never actually packed away for the summer. It's as though they never get really warmed-up inside.
*Tidiness is virtually a sacrament; most people spend a good portion of their weekend weeding their tiny, immaculate gardens, trimming the grass borders with scissors and a ruler (I'm NOT kidding!) and scraping the moss, gum, leaves, dead bugs and anything else from the sidewalk and curbs in front of their homes. 85% of the yards and driveways are impeccably ordered and symmetrical and clean; and, in my opinion, sometimes a little sterile.
Most of the Germans I've met are also timely, courteous, not easily embarrassed, honest and know how to cut loose and enjoy themselves. Germans have a strong work-ethic, but an even stronger sense of work-life balance. When at work, Germans are professional; when at play, they make the most of it. There are more festivals here than you can imagine. They celebrate everything from MardiGras/Fat Tuesday (Carnival, lasts almost a week) to Christmas (Weinachtsmarkt, lasts a MONTH) to onion fests (Zweibelmarkt) and asparagus fests (Spargelfest) and even just being born in a certain place (Heinerfest, a weekend-long celebration of being born in Darmstadt, tho all are invited!) People are well-behaved at the fests; rarely do you see or hear a fight, even though most people are clearly drunk.
Overall, I really like living in Germany (though I do miss my family and friends very much!) My experience here is just beginning, but I can say it has been so positive so far that I really would consider moving to another foreign country next!