Sure. I find the Mail app to be ugly when compared to Gmail and more frustrating to use. Chrome seems to handle text much better than Safari, and the syncing is more convenient to me (because the tabs sync with my Android/Linux devices as well probably). Apple Maps seems to give pretty poor directions relative to Google Maps (just last weekend 2 of my family members got lost on their way to a family party because they used Apple Maps and it took them to the opposite side of town). Everyone using Google Maps made it just fine. Siri's voice recognition feels much slower and less accurate than Google Now.

Any major apps I'm missing?