Ahm...
Well, TENGEN TOPPA GURREN LAGANN!!!!! Is relatively short (27 eps.), AWESOME (like pouring the magma into those hippies), and, well, simple enough. (27 x 1/2 hour = 13.5, and I think one episode is a flash-back filler (basically to fill the gap between the first part and the second part of it)
I searched for it at that site, and either I fail at the interface or it isnt one of the ones available for free there. Also, from what litle I could tell from a one sentence description and a thumbnail it seemed a bit to kinky?
Hmm, there are not many hobby-made anime, that's for sure... But...
Eh...
I have some recommendation, but you must answer this question first:
Do you mind a series that's only comprised of girls? Also, nearly all is loli?
Depends on what you mean. If you mean all/most characters happens to be little girls, I don't mind to much. If you mean it's pedo softporn, then no thanks.
I'm just after any kind of animation that has good serious storytelling and art. I'm not interested in "fanservice" which will just squick me out, and as far as action goes I'm rather indifferent and think it should serve the plot.
On the other hand I don't want to mundane stuff, some decent fantasy and/or scifi (the scifi shuld preferably be hard, but it's not a requirement) elements are preferred.
Note that preference != requirement.