It's interesting how people go about selecting lenses based on recommendations, either from the classical interpretation of what has been used by famous photographers or personal anecdotes. However, while most lens recommendations fit the average photographer, there are some of us that don't have the standard focal view point. An example is the selection of the "normal lens". Some choose the standard 50mm or 35mm. Some prefer 24mm, 28mm or even 85 mm. There is no right or wrong, but it can be costly if you buy based on recommendation only.
So here is my tip for the day. Choose the lens that fits your view point based on actual use. We all have some sort of kit zoom lens or 2 that cover the typical wide to telephoto lens range, especially as beginners when they buy a DSLR with a standard 2 kit lens bundle. Before considering another lens purchase, such as prime lenses, spend a month or 2 or even a year taking photos with your zoom kit lenses. Then download the freeware program, Exposure Plot 1.16 at www.Vandel.nl and analyze your results.
This program can be directed to search all your photo files and plot on a graph visually, what focal lengths you have been using. By analyzing your data, you can determine your favorite focal length(s). The program can also tell you graphically what aperture, shutter speed, and ISO you've been using.
By no means am I suggesting you buy another lens just using this data, but it does help you make a better informed decision.
Ed.