I have to agree with Stewart.  It is a very poor team that contains individuals with an attitude that isolates them from the success of the team as a whole. 

Sadly IT tends to attract more introverted individuals who are just happy to sit in a corner and code.  No problem with that at all (we need focused coders, of course) but when it comes to making a decision on whether a project has been a success there is so much more to it than in an individual perception.  We are a service industry and if we are not providing a satisfactory service to our clients as a whole then we have all failed.