I think I'll stick to photographing mushrooms. You don't need to worry about frames per second, prop blur, buying expensive pro-grade telephoto lenses etc. But I do have to work fast as given a day or two they disappear.
BTW Since there are some very capable photographers here, do you think the new Nikon 70-300 zoom on a DX body will be useful for air displays or will the maximum aperture be too slow?
Leif