This key holder has a design based on triangles - aside from two 30 degree angles, the entire design is based around 60 and 120 degree angles. This leads to a very sharp, angular look, but it depends on the person whether it is liked, as with everything.
NOTE: I apologise, but the file is upside down. It can be printed without supports if the file is placed upside down from how it is in the preview picture.