I made a small addition to What's easy about learning Japanese, noting the nice way in which you can speak about anyone in Japanese without having to know (or even care about) the person's gender. It's a pleasure to avoid English's required concern over Mr vs Ms or he vs she.
Actually, this is not so much something that makes Japanese easy to learn; it's more a simplification that makes the language easy to use. Hmm, perhaps a separate series of articles could be written on that topic? What do you think, reader: Do you have any examples of things that may or may not affect ease of learning, but that affect the ease of using Japanese?