I've spent the last 6 or so years shooting with primes - 20/1.8, 24LII, (2x)28/1.8, 35L, 50/1.8, (3x)50/1.4, 85/1.8, 100/2.8 USM, 100L & 135L - and I've gotten used to the perspective each offers. Some FLs I can frame in my head before looking through the VF (35mm & 85mm come to mind). And in those 6 or so years I've not owned a normal zoom because I found they didn't fit my shooting style.
But lately I decided to get a 28-105II for street shooting and some newspaper work. Very quickly I have come to like this little lens and very quickly it has become a staple in my kit.
And here's what I'm finding now that I have a normal, ~4x zoom at my disposal: Instead of sitting in one spot and zooming to compensate for subject movement, fixed FL lenses have trained me to assess a situation and pick my desired perspective and my FL last. So, with the 28-105II I find that I still work the same way (perspective then FL), but now I don't have to change lenses. 
I don't think I was terribly clear in making my point, so I'm glad someone understands. 


