Why should I buy a 50mm prime lens?

Challenge #5 in the Opportunities series. Hosted by juanlucas.
Challenge has finished
I made a mistake... haven't bought a 50mm prime lens yet. Show me why I should buy it!! MANDATORY to indicate brand/model of lens used for taking the picture (of course, only 50mm prime lens for this challenge).
Show full rules
submission
phase has
ended
95 entries
voting
phase has
ended
1967 votes
only a fast prime can tell such a story
Click here for full size original image
5th place
3.028
 
low
high
Shot with Canon's EF 50 mm f/1.4 prime and a crop cam. I used f=1.4 to get a veeeery shallow DOF and accepted that this lens is then a bit soft in the corners. For me, that's beautiful for portraits, more like a painting. Only cropped, minimum PP.
Camera:
Lens:
Submitted: Wednesday, 29th June, 2011 17:03 (GMT)
Taken: Friday, 22nd October, 2010
Focal length: 50 mm
Shutter speed: 1/60 sec
Aperture: F1.4
ISO: 320
Notes:
Views: 407
Galleries:
Provide complaint details
Your complaint (along with the complaints of others regarding this entry) will be reviewed by the challenge owner. Depending upon the nature and applicability of the complaint, the entry may be disqualified. In extreme circumstances the user who submitted the entry may receive a ban from the challenge or series in question.
Reason:
Comments:
Saving ...
Complain
Keyboard shortcuts:
p previous n next c challenge f full size r retract vote # vote