Good rules of thumb:
- Av or Aperture priority for landscape/portrait photos
- Tv or shutter speed priority for action/sport shots
- Unless you print on a billboard scale or are pro, you don't need high level SLRs with whatever grand amount of mega pixles.
- Don't sacrifice too much shutter speed. Better to pump up the ISO and use noise removal software.
My one biggest lesson in photography and some may disagree with me but the lens is much more important than the camera. There will always be a newer better camera but a quality piece of glass can be kept. Look into prime 50mm lenses. They can be affordable and very good.
