Except for a 70-200 for some projects, I've always used primes. Zeiss, Canon, Nikon, Pentax, Leica, the list is very long as I love glass.
Recently or for the last few years, projects have been so pressured I've rented the 24 to 70 II Canon lens, thinking I'd just use it in a Jam.
Then I find I shoot half the project with it and I've rented 4 different of them and all have been beautifully sharp with great smooth roll off.
I just wish it had stablization, for hand held motion, but I think it's a great lens.
But . . . everytime I go to buy it I think, uh, I've got it covered with primes, then rent it again so now I've realized my rentals have equaled the price, so I just ordered one.
With the 24-70 and the latest Canon 70-200, I can shoot 90% of everything we do.
Though my favorite lens is the 55mm Zeiss for my Contax I also use it on the Leica S2. I truly love that lens.

IMO
BC