I think I see what you mean, although it didn't quite bring out the emotions that Elfen Lied did for me, it was certainly a good anime. One thing I feel it didn't have that Elfen Lied did so well is the characterization of the main characters. In Elfen Lied, you know all about Kaede and Kouta (and also the other characters), their pasts, their motivations, and you empathize with them so much, while that did not really apply at all to Yuuki and the others (though Ozaki is up there). I did feel reminiscent of one particular line from Elfen Lied throughout the entire last quarter of the show... (SPOILER)"The ones who aren't human... the ones who are inhuman... ARE YOU!"
Edit: Time to look for another anime. I do have a pile of suggestions. I'll probably go for FMA soon, or Cowboy Bebop, or alternatively just a short one. I've also been told to look at Steins;Gate and Eden of the East. Anyone else can give me some opinions on those?