I already touched upon this subject in my previous article How To Train, where I addressed the technical aspects of how to choose an opening, how to study it afterwards, how to use the database and the engine. If you haven’t done so already, I strongly recommend you read it first.
In this article, I will analyse various openings from the aspect of their practicality. By practicality I mean easiness to memorise and play. Does an opening require a lot of preparation before you can play it?