Blue Loneliness Screensaver is a nice screensaver which shows a blue ocean. The screensaver takes you to the middle of a blue ocean, showing the movement of the waves and only a few white clouds in the sky. However, the best thing about this screensaver is the relaxing sounds of the waves and seagulls, which, if you close your eyes, makes you believe you are actually near the ocean. Unfortunately, the screensaver doesn't include music and neither allows you to add your own, although I think this was done intentionally, so you could concentrate only on the sounds.
Regarding the settings, you will only be able to adjust the animation speed and select the image size. In case you find the sounds disturbing or annoying, you can easily mute them by unchecking the "Sound" box. If you want, you can also add a transparent analog clock in one of the screen corners, so you can keep track of time while you are not using the computer.
In short, if you are looking for a pleasant screensaver to decorate your screen with, Blue Loneliness Screensaver can be an excellent choice.