My cameras are all old manual-focus/manual exposure units and I have stuck to primes. They are faster, lighter, and they have simpler optical formulations, so I trust them to be better corrected. My personal bias is that simpler is better.
Another consideration is that with manual focus, slower lenses (like zooms) tend to black out the focusing aid on the focusing screen.
If I got a new digital, auto-focus camera, such as a Fuji X-series, I would probably start with the 18 - 55mm zoom, as I've read good things about it, it covers my favorite focal lengths (85 and 28), and I would gradually add primes. I would probably stick to primes for my film cameras, however.
- Murray