It is time for fun. If you accepted that using Android phone to control hardware is fun:) Android become very popular and if you into microcontrollers it is pity not to use that knowledge for making cool applications. If you experienced with microcontrollers it is useful to expend your knowledge with any object oriented language. That can be useful for future job opportunities. For Android you need to know Java programming and usage of Eclipse IDE for Java developers. Maybe sounds hard, but today there are a lot of free online courses about Android and plenty of examples and complete projects.