I shoot only 35mm and medium format. The former in particular tends to encourage bracketing, whether in b&w or color. I also tend to segregate my shooting styles and subject matter according to the format. With 35mm I tend to shoot rapidly, casually and make lots of insurance shots. The subjects are often people.
I bracket with impunity when shooting for Diafine since adjusted development is impossible. This is essential to my nighttime photography. As long as there's time to bracket I'll do so.
Most of the time with MF work, tho', (generally using developers other than Diafine) my approach is more deliberate and I seldom make more than one exposure of a subject. If I do I'll often recompose as well. I'll spotmeter, think in terms of N+/-, in effect doing everything I don't normally do when using 35mm.