Is there a preferred orientation to approach (or leave) a space station for docking? Is it from below? above? by change in the inclination (port or starboard) from ahead or aft? I know recently the Soyuz has been using a bi-elliptic transfer orbit to get there. That makes me thing from below. I have also read that they have on occasion changed the station attitude for a docking. The pictures show the docking as always being on the earth side. But I don't know if that's because it's the best angle to approach, or because the docking section is the most massive and therefore oriented to earth by tidal forces.
I don't know about ISS procedures, specifically, but in general it'd be preferred to approach from the orbit normal or anti-normal (from above or below), assuming the station is not tumbling. This means the docking port would appear to rotate as you approach it, so you just need to set up a roll rate to match. If you approach from any other directions the docking port appears to rotate away from you, which means you need to translate as well as rotate to keep up. In practice, this rate is low (one revolution per orbit) and not a difficult problem to solve, but lacking any other factors (such as lines of sight/clearance, not sprayrng the solar phnels with your thruster exhausts, etc) then an approach along the orbit normal would be easiest.