I found Loveless to be decent. I honestly was really creeped out when I first watched the show, as Soubi was acting incredibly creepy. I actually checked online to make sure I didn't accidently buy anything really creepy >_>
Anyway, I thought the series was enjoyable though a little boring at times. It was honestly getting really interesting near the end of the series, and I was disapointed the anime series got cancelled. I will probably pick up the manga series one of these days.
Also, I absolutely loved the opening theme. I thought it was really beautiful.