Funny. My best game was also as Germany. I had made an alliance with France against England, and alliance with Italy against France, and an agreement with Russia that kept him out of Galicia. While Turkey, Russia, and Austria were butting heads in the south-east, France and I managed to completely wipe out England using the Flemish Sealion, while Italy was left only with Tunis due to some good defense by France. I then stabbed France and took their home supply centers as well as their English ones (Russia had by this time taken Norway), while Italy took Iberia.
There was a bit of a spat between Italy and me over the MAO, but I kept him out of it by threatening to take Spain and force the Mediterranean, and he retreated back to Gibraltar. Both of us then turned west, Italy stabbing Austria and me attacking Russia in Scandinavia. By this time I've got fourteen SCs, so the others are starting to get worried, but Italian pressure on their flank prevents them from forming any sort of stalemate line, and I end up with France, England, Germany, Belgium, Holland, Denmark, Norway, Sweden, St Petersburg, Warsaw, Moscow, and Vienna for the win.
Good game that was. We should really try playing Diplomacy over the forum again.