Being pretty new to photography, investing in a lens rather than a new camera didn’t instantly come to mind. I did take my first step in this direction however, buying the Canon 50mm f1.8.
It’s probably one of the cheaper lenses available, but so far I really like it. It’s very light and small, which is great if want to ‘reduce’ the weight of your camera. I expect to be using it a lot for this reason.
It does have some drawbacks. It’s loud when focusing, looks as cheap as it is and it produces pentagonal shaped bokeh. The last characteristic is not always desirable, but actually not very noticeable when using a large aperture.