Product development and improvement is a long, but very exciting process. QA need to understand other people ideas, analyse the way how these ideas are implemented and whether these meet end user needs. Sometimes you need to argue, persuade, start everything from scratch multiple times. It is a real pleasure to look back at work that has been done till actual product release and hear positive feedbacks from people using that product. Another exciting part is automation process. Manual testing of some areas may take weeks. The team is delighted when you manage to design a process that allows to run same tests automatically within an hour and that makes you feeling great, too.