Slaine has pretty much redeemed himself in my opinion. I know most people hated him after his temper tantrum during the S1 finale, but even then at least he was somewhat interesting. Thing I hated most about him before was that his alliance with the count felt very out of character. I'm going to be sad after his inevitable loss to Egg boy.
There is quite a bit I want to say, but Aldnoah Zero is not worth the effort. Apparently, the director and writer(s) felt so, too. To summarize, this anime is basically the new Fractale.
The storyline was interesting and the music is awesome but the ending was just so fucking disappointing! And the Princess just has to marry the guy's son who's father tried to kill her who only appeared close to the end of the season and the Inaho x Hime along with the Slaine x Hime ships are both sunk due to it and the ending felt rushed! They could have at least had Inaho show more emotions at the end of the anime too but no... I rate this anime 5.5/10 Great beginning epic season finale s1. S2 gives us explanations decent and the ending god awful bad