I've only seen 1, 2, 3, 6, 7, 8, and 10. I think I like 6 (the Jirachi one) the most, maybe because of how sweet it was. And I really love "Chiisaki Mono," the ending theme; I used to know most, if not all, the lyrics. Wait... I just noticed that this was the only one I saw subbed (unless the English version had the same ending theme somehow). And it was the last one I saw (which was actually a few years ago), so maybe memory has something to do with my choice. >_<