It’s hard to imagine that one could really tweak or improve iTunes in any particular fashion. I say that not because the software is perfect, rather, because it’s completely closed-source. Apple doesn’t have a list of extensions that you can just install into the application at a whim. If anything, iTunes is built for two purposes and two purposes alone: Buying stuff from Apple’s Store and transferring said stuff over to an Apple device of your choosing.
Yet, the more I looked into ways that one can extend the iTunes experience, the more I found that yes, Virginia, there are plenty of different tools, add-ons, and techniques you can employ to really make this music application shine. And before you start in the comments, yes, I know that there are better music players than iTunes. However, that’s not to say that iTunes itself is a poor program—with a little tender love and care, you can make it as welcome in your home as any other program you enjoy. Trust me.