I'm really confused on what this could be for me. I think Evangelion is possibly the number one contender for the spot even though i find major flaws in the show itself. But it's the anime that really got me into anime in the first place and also kind of introduced me to a higher class of anime than most Shonen. Or maybe it was Digimon, that show really made me a geek back in my younger years. I love a lot of things but as for all time favorite, i dont think i can choose a show that was constructed or produced better, but a anime that had the largest impact and impression.
It's simular to my favorite game, FInal Fantasy XI. The game is just now so horrible and grindy! I never even got up to the max level like most dedicated players, but the world, the art and the memories keep making me smile in nostalgia.