Aria - for the innocent charms of the characters whose names all start with A 
I thought I was the only one who noticed that

It took me forever to memorize who was who because they all started with that damned letter!
As for me... lets see...
Haruhi - I accidentally watched it in DVD order the first time around, So I want to see what It would be like to watch it in TV order
School Days - Simply because this will probably the only way I could get myself to watch it again.
Aria - One of my top 5 animes of all time, I would love to experience it (for the first time) again
Code Geass - Half of the Awesomeness of the show was the Crazy cliffhangers and going holy shit at what just happened, and sadly I won't feel that ever again for this show.
Oddly enough I skipped my favorite Anime: Ghost in the Shell. But that is probably because it is an anime that you appreciate more the more you watch it (even though watching Motoko Use that Sniper at point blank range again would be awesome

)