Attitude
I think Rainboe overstates his case rather. The tone of his posts implies the only people with a bad attitude are those who come from a military background. Nonsense. There are good bad and indifferent from all walks of life. The most arrogant guy I have ever flown with was an all through commercial guy. As for the mindset for precision instrument flying. An ILS or a hold in an airliner is just the same as an ILS or a hold in a military aircraft. Mostly in an airliner you will do them with the autopilot coupled anyway. All experience is valuable. To say that flying a FJ would provide you with no skills or judgement that would prove useful in airliner is rubbish.
As for copilots who feel they are better qualified and able. A good captain in the LHS will recognise and foster the abilities of the person in the RHS. He should not assume that they are less qualified and able than himself.
Out of all the posts the most evident thing is that arrogance is a bad thing when you start a new job. Just like any new job when and if you join an airline you will have to prove that you are up to it and that you can fit in. An airline is a very different environment from the military. In fact in day to day terms airlines are way more efficient in the way they operate the ac. However, like the military they have SOPs and methods developed from experience to suit the requirements of the operation. Adapting to those is just being professional.
I have been in the military and in an airline. They are different and I have enjoyed both immensely. The second paragraph of NSFs post is spot on. Enjoy.