Bothering with strange feeling

I am a professional in software industry since last four years and doing well in other's (not me!) perspective. Although I do my job with great enthusiasm and dedication and tried to finish the job with almost no issues, but sometimes, I could not achieve the stage of perfect ness as I have expected from myself. But for that, I believe that is fine too, as it also helps in some form of improvement.

But I realize one issue within me during four years span of my experience. This issue always comes after three or four months of joining new projects. Whenever I join new project, I tries my best to keep my learning curve high, so that I can cover all information in fewer time than anyone else. During learning curve, I felt so much excited that I can't explain here in words.

But as soon as I learned in good extent about the project and felt comfortable working with project, I felt bored with the project just after working for one or more month in that project with my full capacity. It seems to me that there is nothing new to do in the project. Sometimes even situation got so worse that I don’t feel to do any work that is related to the project for few continuous days, and that situation makes the matter worse. Even sometimes that raised the concern within myself that if I am heading in right direction for my future.

At that time I extremely felt to search something new in technology or anything that I have not done earlier. In this whole process, I evaluate myself very badly and then felt frustrated. This feeling continues until I do something new in any forms, weather it was related with software industry or anything else. For example sometimes finding new website that help others for some troubleshooting provide me satisfaction or finding a new News website in Hindi, even learning cooking was also one possible solution for me to come out of that situation.:)

I am not aware if any one else has also felt the same with oneself. As I never heard other people to say like this. So I am trying myself to overcome this issue.