From where I stand (as a 'sound guy'), there is an important distinction between the two types of live sound tech - house guy and freelance guy.
i work as a freelance soundguy and as a house guy in my hometown.
House guy, on the other hand, works in the same venue night after night, with a variety of bands many of whom he has never heard before. This can cause a problem when said band gives no information to house guy and expect him to provide a result which they desire.
well, there is a thing called myspace. a local soundguy worth a dime will check the artists profile.
As a result, house guy can become jaded about his work and will expend the least amount of energy and time tailoring the mix for any band. He may become so embittered that freelance guys who show up to his house get treated like morons.
that depends a lot on the venue the house guy is working. if it is a well known club with a tasteful booking the house guy will mix good bands in a big variety of styles. this can be an important advantage and in the long run the house guy will be way more experienced than the "freelance only" guy.
There are too many differences from one guy to the next.
again, i work in both positions. do i have a problem now?
If you're a band who cares about their FOH sounding great every time, don't expect house guy to do it for you - get freelance guy to do it instead.
and again this depends on the quality of clubs you are visiting on tour. over the decades i saw quite a few guest engineers which did a bad job. plus the house guy perfectly knows the room and the p.a. system.
well, he should know.
I'm also annoyed about the whole D.I. thing with bass. I am DEAD SURE that I don't want a D.I. bass as my sound. Not the highs, not the lows, not the mids, and certainly not the ugly transients that go with it. The soundguy then goes and sends the D.I. alone out to the FOH. He insists that that's what bass is SUPPOSED to sound like (that's what they've actually told me a fair number of times).
simple: always mic up the cab and use a d.i. too. it is a good thing to have options. sometimes the mic signal is killer and sometimes it is just a boomy hell. most of the bands in our club come from foreign countries and have to deal with rented backlines that often are in a bad shape. in this situation it is a good thing to have something like the sansamp bass driver d.i. at hand.
sorry for my bad english and greetings from germany.