I think both styles and backing tracks have their place. I use both, depending on the venue. For the good old music of the senior set, I use styles that I can change to my liking. However, if I want to be somewhat relevant in a younger crowd, I will add backing tracks and play and sing over them. It is one thing to put your stamp on a song you play well, but another to perform a song specific arrangement that is merely recognizable. In other words, which method produces the best results.