Can anyone reccomend me any manga (any genre) where the main character(S) is crazy/psychot...

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I've actually been looking for something kind of similar..... it's been a bit since I've read some of these but they should all fit that criteria if I'm remembering correctly:

http://www.mangago.me/read-manga/prison_lab/
http://www.mangago.me/read-manga/bastard_hwang_youngchan/
http://www.mangago.me/read-manga/ludwig_revolution/
http://www.mangago.me/read-manga/dendrobates/

Warehouse it's yaoi and I'm not sure

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Ohh, this one doesn't exactly fit, but I think the MC's slowly turning psychotic.

http://www.mangago.me/read-manga/kami_sama_ki_sama_o_koroshitai/

You cn try Ogawa Chise or some of Harada's psychological yaois.

pick out the ones i marked as seme. just a warning that majority of them are outright psychotic in their love for uke he doesn't mind doing something criminal. http://www.mangago.me/home/mangalist/43233/

http://www.mangago.me/read-manga/mirai_nikki/
I did not read the manga but I did watch the anime. The main female protagonist is a real psycho Σ(っ°Д °;)っ