Well I've never bothered with the Films because by the time I realised there WERE films... I was on episode 300 and didn't want to revert back to the older ones .
A film per 2 years would be great, one ever 100 episodes or so (104 - about 4 for christmas and suchlike)
I'm disappointed that Avril's song is only a ending theme :\ I've been listening to it avidly for the last week D: it's so... entrancing!
I've listened to the soundtrack all the way through a couple of times.
And in final point, I'm assuming the woman has blue hair? She's from episodes 570+, they do a few episodes with her and one of Z's underlings, explains a bit more as to Z's ambition