In my opinion developing process can be unbearable boring if you are programming some abstract things with narrow focus. Doing this will make almost anyone unhappy and cause depression. :)So, I always try to connect developing with some areas of activity, which are really interesting for me - marketing, advertising, crm systems, tourism. Building of systems for collecting, processing and analyzing information in these types of business gives me real pleasure.Although, I confess, I had not enough time to cover all areas of my interest. Namely - space technologies, robotics, artificial intelligence systems, smart home systems and some other. But I'll try as soon as I have an opportunity :)