[elmomalmo]

In my experience, if you switch projects regularly you become increasingly dependent on your network of previous bosses and colleagues for future gigs. It's stands to reason that you will want to do the best job you can, produce the best code you can so that you have a better chance that you when you leave, you depart from colleagues that will be eager to work with you again in future.

Getting bored easily and professionalism are not mutually exclusive.

Edit: Grammar