Just finished this up and I've got to say this is one of the best romance-genre manga I've had the pleasure of reading.
There's so many things I found enjoyable about this that it's hard to know where to start. I guess the first thing that jumps out at me is how "Japanese" this manga is: from the traditional views of honor and family, to the snapshot of what may be considered the ideal Japanese woman (by traditional standards), to the thoughts of those who feel outcast from Japanese society; this manga is deeply immersed in all of it.
The story is both very traditional, and yet also quite uncommon in conventional manga. The feelings of love, honor and family which permeate the chapters give it a very distinct feeling that is surprisingly missing from much of the stuff that's out there today, and because of that it feels fresh and unique and even the traditional genre cliches are given a new spin.
It also helps that I found all of the characters quite endearing. Each one was fully fleshed out and realized, albeit with some gaining quite a bit more time than others, which is one of the few faults I had was the book. I did find that an extraordinary amount of time was given to a couple of the female leads, while others had decidedly less time devoted to them. Not to say that any of them were glossed over, because they weren't, but it is noticeable none the less. Still, with that one criticism aside, all the characters are quite charming and I find it hard to pick a favorite among the girls.
I must give credit to the writer too for not dumbing down what could have been a run-of-the-mill harem title. There are the various conventions to be sure, but everything feels natural and more grown up, like the author assumed the readers would be more mature and thus raised his own level to meet their expectations. Even something as straightforward as the ecchi scenes and fanservice (of which there is a lot) feels much more natural and I don't ever remember feeling like it was tacked on just to appease the male audience.
I've read some complaints about the artwork, which surprises me as I thought it was very well done, and was able to match the tone of the book quite well. It never overpowered the story and instead served to enhance it, which is how it should be. In fact, if you look at some of the author's more recent work you'll see that not much has changed between now and then, which is fine by me as I find it really seems to compliment his particular style.
Also a word about the Tokyo Pop translations: in the past I've been critical of the work they've done and the liberties they seemed to have taken with some of the original language, but here it seems like they were a lot more faithful to the source material. I don't ever remember coming across a particular phrase or a piece of dialogue that made me shake my head in wonderment, and I commend them for that.
So to wrap it up, if you're at all a fan of a more traditional Japanese story, or are just looking for a good romance manga with plenty of comedy and drama, I can't recommend Ai Yori Aoshi highly enough. While it could have spent a little more time on some of the female characters, it's still one of the very best this genre has to offer.