One of the hardest parts when editing a video is determining what music to use. This process usually takes almost as long as the process of capturing and editing the footage combined!
This is the hardest lesson. Whether you personally music is irrelevant. Sorry! For the full success of your project, you have to detach your personal musical tastes and consider what best serves your project and above all your message to your target audience.
So give it some thought early on, think about your audience, and if you’re not sure, take advice.