This is the first time I ever really have to say that I have trouble reading comfortably the content of a website. This low contrast of grey in grey in grey combined with very fine font style makes it hard to read.
I took the time to get some colors of your side:
All greyscale offering low contrast.
“Typical” sample: http://i.imgur.com/US2GzhW.png
Beside the fact that I am a huge fan of dark themes, this is really hard to read for me.
Beside that I really like the basic UX of your website!