Prime vs Zoom... there is no universal right answer. Me... I prefer primes but I've spent a fair share on zooms as well.
And I prefer primes because, even today, I think they are sharper, usually faster for a lower cost and lighter.
Some further thoughts regarding previous posts:
* Just because we are talking primes, doesn't mean just a 35mm or 50mm
* Just because we are talking primes, doesn't mean that you are only carrying a single lens.
Both of those are very true. Prime shooters usually have an array of lenses covering a wide range of focal lengths. The lenses in my 35mm film kit covers from 24 to 250mm. 24, 28, 35, 50, 85, 135, 200 and 250. True, there are some gaps, but those are not very worrisome.
* Just because we are talking primes, doesn't mean that you must carry 4-5 lenses to fill in every possible focal length gap to equate a focal range of a zoom.
* Its not necessarily an This or That question. My smallest package for a walk around was 24-105L + 50mm f/1.4.
* Both have their usefulness.
Some people have to have every possible focal length covered because they don't know what they are going to shoot when they go out. But if you're going after specific images, you usually only carry a few of the lenses