I have noticed a tendency in my own work. That is, to make my titles and other text centered. It's the default in my brain and its obvious in my music poster design. I struggle breaking away from that but i have a bit in the changes I made to my poster. When I made the "A" in battle really big it automatically "de-centered" the word adrenaline. Consequently I had to move my quote and quote author to fit accordingly and I think the composition is a lot stronger than it would be centered. I think centering things is a great way to keep balance but, for me at least, its good to break away from that sometimes and create an interesting composition with other tools.