Best read if you imagine Jeff Foxworthy intoning, "If you. . . . .you might be a pixel peeper."

http://www.lensrentals.com/blog/2011/12/the-gear-head-pixel-peeper-quiz

13. A 50mm prime lens is:
1) An indispensable tool every photographer should own
2) No longer necessary since excellent zooms cover that range
3) A double-gauss design that is likely to have spherical aberration and astigmatism

I scored 3. Interesting.