1. El Hazard(of course, i'm not too big on the wanderers though...sorry el hazard fans :-/)
My top Three..... El hazard is definitely right at the top! Kimagure Orange Road would certainly be next. As for the third..... well that tends to change alot. Although if you need a recommendation of what to watch next, and you like El hazard, then you simply can't pass up Slayers! I recommend it HIGHLY. xxpacmanv1, Tenchi and Vandread are excellent. I think you'll like them. What did you think of Hellsing, BTW? Maze, You're Under Arrest, Magic Knight Rayearth. Gatekeepers and 3x3 Eyes are also excellent. And whether or not you like baseball, Princess Nine is really a great series. I'd also recommend the absolutely hysterical Excel Saga. Although it helps to know ALOT about anime and manga, otherwise you won't get alot fo the jokes (many of which are very subtle). I really liked Betterman also, and thought it was very underrated. And if you like samurai stuff, Carried by the Wind (AKA Kazemakaze Tsukikage Ran) is the way to go!
Is grave of the fireflies done by Hayao Miasaki? (not right spelling, i know. Well, unless it is.)