Didn't say they all were harems Chaos, just almost all of the most recent ones.
Watched a few more
Ga-Rei Zero- wow, no really WOW. Saw some pic's on a blog and it looked intresting. Watching it is seemed vaguely reminicent of BLASSREITER, zombies and larger deamon like things,and a similar team made to deal with them with grunts and eltie members, bike-fu. Thing was it seemed a bit grittier and less ... Gonzo? It gave enough back story to let you know what was going on, without spoon feeding it to you and leaving some for a later date. The characters while some what generic were done in a why to show that there was more going on than was told, but in a realist manner. The grunts also weren't just cannon fodder, they where effective against a certian (low) class of deamon, but not so against higher ones, which when they turned up they tried to sensibly retreat. As of the ending... greatest WTF moment for a 1st episode for a LONG time. Keeping this one.
Shikabane Hime aka - Weird little one, could describe the plot, but it would make it seem too much like a lot of the other dross out at the moment. It's sort of a supernatural action show, with unkillable schoolgirl fighting other deamons. While that's been done to death recently the vibe was.. different. More Birdy the might decode but darker rather than a more shounen show like Buso Renkin.
Also caught Index, but can't see why everyone is raving about it.