I enjoyed Kareshi kanojo no jishou a lot except 
for the ending, which was hacked due to a 
conflict between the author and the anime 
people, I believe.  Though, I can certainly see 
where it might become tedious to some people who 
can't like the characters that the story is 
about.  I liked both of the main characters, so 
that's pry why I generally liked the anime.

I already commented on .hack//SIGN 
(pronounced "dot hack sign" - need to be 
specific because the game is called simply "dot 
hack" where as there are various OVAs and such 
too.  I throughly enjoyed this series, but that 
is probably because I could somewhat relate to 
the story/characters.  If you can't do that, 
then you probably won't enjoy it.  I think this 
pretty much goes for any story, though, too.

And finally Angel Sanctuary (I've never seen 
Digi but.... i figure it's something like 
pokemon...so I avoided it)...  The anime covers 
the first 3 of 20 mangas.  It's a very dark and 
somewhat sadistic story.  So if you can't handle 
that kid of stuff, then you certainly won't like 
it.  Me, I love it because it's got awesome 
looking male charas with wings...and there's 
plenty of inner-conflict as well as external...  
Plus, there's a good amount of blood in it, so 
all of that = Rekka likes it!  lol  I'm starting 
to turn towards the "horror" aspect of things 
these days, though...  haha