GE
MC/Shou, moving forward maybe, if Shou's worries don't derail it that is?
... I still prefer Yuki, though.
High School DxD 1-10 (all so far)
Action harem fighting manga thing about a guy who becomes a devil fighting against fallen angels (so far, they're the opponents). Yeah, I wasn't really expecting to like it, but ended up reading all ten chapters one after another, so I guess I kind of did... so yeah, it's okay and did keep me reading. The cast and plot are mostly generic, but there are some somewhat different elements to it, and it is entertaining. The plot's okay enough to do, too. There's quite a bit of fanservice too, but a welcome absence most of the usual anime female reactions (Rias, the female lead, just doesn't care at all about being seen naked, for instance). The MC is perverted and basically is thinking about girls almost all of the time, and as always for anime leads is kind of stupid too, but he's not really unlikable. The cast a a whole's nothing special, but they're just interesting enough to do.
Despite the concept, this series, so far anyway, really isn't depressing. That's nice. I hope it stays that way. The main characters are all devils though, but they don't exactly do much of anything demonstrably evil that's shown... either they're not particularly evil devils, or that side of things is not shown in order to make the main characters more likable as protagonists. I don't know which it is, some of both probably. Oh, and the MC? Apart from wanting a harem, he's not evil at all I'd say, so far anyway.
Those stats are dumb and meaningless - the US population is regressive also if you don't count immigration.
The US birthrate, not counting immigration, is 2.06, one of the highest among first-world nations and only barely under replacement (2.1). The Japanese one is 1.21, one of the world's lowest. Now in the US immigrant groups do have the highest birthrates, but still, the US birthrate is far above Japan's, it's not close.
Signs point to it being canceled by the author himself (he thought he could take the mirror further but found out otherwise, plus the MC can't move anywhere on his own -> "why did I do this")
Nothing to contradict that it was canceled by Jump, though.
Was it unpopular in Japan? That could well have led to a cancellation... as for that first paragraph though, eh, I don't know. I can think of plenty of ways they could use that plot concept for stupid hijinks, but it does a lot less of them than you might have expected, to its credit. But still, it doesn't really seem like there was nowhere more it could go... I don't know though, maybe you're right and the author wasn't liking it as much as they had thought at first. It is a reasonably good series for its genre though, I think.