I've just finished watching all episodes of Genesis of Aquarion, the prequel of Aquarion EVOL (not yet watched), and I'm completely floored by the quality of the Mecha design, CG, soundtrack and animation. Absolutely top notch.
I also like the elements of the plot, very well thought out, symbolic and I can sense that a lot of research has been done. But what I think was a let down is the inconsistency of each episodes and that it's quite slow going. The story is very good but the structure doesn't hold to itself. Too many filler episodes and a lot of disconnectivity with an episode to the other. It feels like I am being given bite size sandwiches rather than one big sandwich to eat.
So in summary, for a 2005 anime, the animations are excellent and one of the best I've seen but the story doesn't hold to itself and becomes somewhat confused and doesn't create a unique identity not like No.6, Blassreiter, Eden of the East, Bounen no Xam'd.
Talking about Blassreiter. God that anime was beautiful but yet absolutely sad and depressing at the same time. I absolutely love that anime. Not for everybody though because of its very dark theme. IIRC, I don't think there was a single funny episode in Blassreiter but if you can look past those things I absolutely recommend it.
Oh yeah, I'm picky about anime and I like watching those obscure ones that nobody has ever heard of.