Oh, I liked Ryuki. But it too had slow pacing for the first 20% of its run. And unlike Blade, it gave me a clear view of its world, a base running plot and a decent summary of the conflicts therein
before deciding to run in place for an extended amount of time. That, I can deal with. Again, I'm a very forgiving guy
Agito does the same thing mentioned above, but much better. I only took a break from it because it literally became the exact same episode over and over.