I just finished these two
Chaos:Head = was alright, seems like up to episode 7 or so they forgot they were in a 12/13 episode series and started rushing like crazy so the end kinda sucks. I thought it was kinda interesting, though.
Vampire Knight Guilty = Typical school romance stuff but this time with vampires! lol! Anyway it was alright but the last episode was a letdown lol, nothing happened. More of like 'life goes on' than anything, bleh. This is based on a manga aimed at girls by the way just so you know.
Started up Zoku Sayonara Sensei and it's pretty awesome like the original series was, I always recommend it to people and this one is still good. There were a few parts so far I haven't liked much but overall it's been great.