Oskar Krawczyk is a UX and Front-end designer and this is his portfolio site. The simplicity and subtle details found on this site are very impressive. The background is a nice paper texture with some grunge aspect to it. The grunge factor really makes the paper pop off the page. I love the nice line drawing self portrait and how it is used in part with the navigation. When you roll over the different buttons a speak bubble pops up, which adds really effective interaction.
When you navigate to Oskar's portfolio, a nice box pops up that displays slides of his work. The user can click the arrows to slide through the portfolio samples. A great feature of this portfolio is the way the slides fall into place. Rather than simply sliding into place in the display box, the images actually bounce into place, creating a visually interesting experience.