This is not easy to answer. After so many games, it is hard to remember them all but both Ataegina and Desert Stalker stand out. Ataegina is nearly complete (2 parts) but Desert Stalker has a long way to go. Neither is anything like Eternum. What can I say, I like variety.
When you said you had played the game more than 30 times, of course I could not ignore it. I traced it down and got it. Soon I realized that you were right. Even though it was not the kind of game I would usually choose (anime), it is far better than I expected. It just gets better as you go on. Thank you for pointing it out. The one thing that really surprised me is hearing the music from Ataegina in this game. It has one of the exact same songs.