The thing that is possibly the most irritating to users is the continual reminders for updates on android. Many applications and software require updates, but there's no way to control informing users about the forthcoming update. If you are doing crucial work, for example paying a large amount or writing an important email, or messaging someone, and then notification of an update appears at the top of your screen. It will surely hinder your workflow, and this is one of the drawbacks of Android devices.