The only filters I tend to use are Noise Ninja and Polaroid Dust and Scratch removal. Noise Ninja is great for those must get shots at very high ISO. I have a D70 which has terrible low light capabilities so I tend to use it a lot for my night pictures. Polaroid D&S is really only used for bad dust in digital files and since I scan a lot of negatives and slides I tend to run into dust a lot. Best part about it is that Polaroid gives it away and it is a lot better on speckled dust than healing brush or clone stamp.