Well, since our personal scopes at my program only get 4x, 10x, and 40x, I'm a 4x guy. I can do the bulk of my work at that power, and then go higher for things that catch my eye. Small biopsies will get perused at 10x, but 40x is reserved for hi-po nuclear detail viewing. I'd like a 2x and a 20x, but eh, I get by for now.