Originally Posted by Dallaz

Aperture is great. I use it for everything. As for a Lens I'm not too sure about Canon's stuff because I shoot with Nikon. But a suggestion would be to get a lens with a large aperture such as f1.4, 1.8, 2, or 2.8. With larger apertures (aperture is the blades inside the lens that open and close to control depth of field and how much light can hit the cameras sensor during any given shot) you can blur the background by controlling the depth of field which is great for isolating the subject, and they're also better for getting faster shutter speeds by allowing more light to hit the sensor, which means less blurry photos.