I don't know if I've mentioned, but I'm also studying (or refreshing, I suppose) German grammar (at a pretty leisurely pace - about once a week), with a Russian textbook that I bought once on a whim. Came to the grammatical gender, and it doesn't say anything about which one is the most common... But where I am in my learning, the endings which correspond to genders are pretty useful. I don't know how much they are to you, though - I kind of imagine that they aren't a lot more than a list of meaningless letter combinations at this point.

The weird thing is how, well, the ending -ung is counted amoung feminine. Everything's been confusing me about that recently. Both Wiktionary and Duden (the most authoritative German dictionary, pretty much) give it both feminine and neuter, I'm pretty sure... I don't know. Surely, people don't randomly switch between genders of a word.

Anyway, perhaps it helps to know that I'm suffering somewhere alongside you.