Some fisheyes have low Minimum Shooting Distances, e.g., the [Walimex/Samyang 7.5mm fisheye for Micro Four Thirds][1] has one of d=9 cm. So you can get quite close to your—preferably organically shaped—subject to get some really unusual, almost macro-like viewpoints. May be nice for creative photography. I plan to get one of these lenses.

  [1]: http://www.ephotozine.com/article/samyang-7-5mm-f-3-5-umc-fisheye-lens-review-19847