The website itself is great... to the point, shows your work well and the black background helps bring the photos out a lot.
Might help to have an indication of which city you're based in, I get it that you're in the Netherlands, but it might help
In terms of content in your portfolio, there are a lot of great photos in there, but there are definitely some that are in there that either should be either removed or made smaller (the two-image per line style), while there are some that are in that smaller format that should be made bigger! For example... in your Winter Landscapes, the photo looking down from the hill(?) toward the church... the composition and content doesn't warrant being in that portfolio alongside amazing images like the two that are in the 4th row (bike at night and the cabin at night - much stronger images and I wanted to see them bigger!). The last two images in that portfolio section also don't add much to your body of work as it currently stands... Maybe a B&W conversion would help since they're fairly monochrome as it stands?
Great website though and great photographs