The Use Of Lines In Images - Diagonal Lines

Here are some photos that in my opinion follow diagonal lines, whether obvious or not.

Here are ones taken out of college - here as you can see the diagonal line is the photo frame, and from the frame it leads you too the person in the center of the frame. the focal point of this picture is the girls eye in both of these photos.

Here are ones taken in college -

here the diagonal line didn't work  as well as i hoped, the diagonal line is not as obvious as i wanted it to be.

Here the diagonal lines worked really well, seeing as a corridor is naturally a diagonal line leading some where as well as the stair case.