Alright then. Inaka Isha is an adaptation of Franz Kafka's short story "A country doctor". In my opinion, it transmits the atmosphere from his books quite well (I don't know what else to say about it, if you're familiar with Kafka's works you should know what I mean ^^'').

Kanashimi no Belladonna is a movie with some psychedelic tones about a woman who was raped on her wedding day and how she later started communing with nature. This one is set in the middle ages, and it's somewhat erotic, tough I still recommend it if you still dislike that kind of stuff. Very unique style and beautiful animation sequences.

Monster, who is actually fairly well known amongst more dedicated anime watchers (by this I mean people who care to look for hidden gems, I don't mean it in an offending way), is about human nature. What makes people monsters and that sort of thing. I'd rather not give you an explanation of the plot, since it's always more interesting when you find out by yourself (at least that's how I feel about Urasawa's stories xD). It actually takes some episodes for the story to take form, but its really worth it, at least that's what I think.

Texhnolyze, another one which is not that obscure either, kind of also deals with human nature (it is COMPLETELY different from Monster tough). Well, I don't know how to explain it, since I watched a few episodes, and then finished the last four months later. I don't have a solid idea of the plot (kinda forgot), I'll have to re-watch that one xD