I've got slide film from Kodak and Fuji. There are differences between how the brands and emulsions render certain situations and I'll choose the flavor I think is best for the situation at hand. As readyloads become harder to find, I'll have to shoot more and more Fuji quickloads when hiking and backpacking.
Again for color negatives I've got both brands. I really like the new Portra 400NC, but its not available in readyload, so I've got a good supply of Fuji NPS quickloads for backpacking.