It is all about the glass – The Canon nifty 50
For taking good photographs and getting that narrow depth of field with your subject perfectly in focus and the background nicely out of focus you need to have a faster lens. Opening up the aperture so that you have it as wide as the lens will let you go gives you the narrower depth of field. So being able to go to F 1.8 with the Canon nifty 50 lens will be better than using the kit lens which will only go to about F 3.5. There are other benefits to having a faster lens the main one being that you can let more light reached the sensor. You will be able to get better pictures by being able to let more light through.
Not perfect but very good value for money
Canon has made this F1.8 available at a very good affordable price, somewhere around the $100. My son has one of those Canon lenses that he uses on his Canon 550D and he wants to buy an even better lens. I am lucky that he is willing to sell me his nifty 50 Canon lens. The nifty 50 lens may be a cheap lens but it does give you good results.