One of the great things about WordPress is the community and the number of great plugins that can do amazing things with little effort.
But all that code, as any good developer will tell you, is a liability. How do you pick a plugin that not only meets your requirements now, but will both continue to do so? WordPress advances. APIs change. Plugins need love too.
Many moons ago I settled upon Flickr Gallery, a plugin that allows you to import Flickr images just by adding a short-code to posts. I thought there was value in keeping all my public photos in one place and, at that time, WordPress had poor media management facilities. The plugin seemed popular and well supported.