I don't believe a dev team should have style guidelines they must follow as a general rule. There are exceptions, for example the use of <> vs. "" in #include statements, but these exceptions should come from necessity.
The most common reason I hear people use to explain why style guidelines are necessary is that code written in a common style is easier to maintain that code written in individual styles. I disagree. A professional programmer isn't going to be bogged down when they see this:
for( int n = 0; n < 42; ++42 ) {
// blah
}
...when they are used to seeing this:
for(int n = 0; n < 42; ++42 )
{
// blah
}
Moreover, I have found it's actually easier to maintain code in some cases if you can identify the programmer who wrote the original code by simply recognizing their style. Go ask them why they implemented the gizmo in such a convoluted way in 10 minutes instead of spending the better part of a day figuring out the very technical reason why they did something unexpected. True, the programmer should have commented the code to explain their reasoning, but in the real world programmers often don't.
Finally, if it takes Joe 10 minutes backspacing & moving his curly braces so that Bill can spend 3 fewer seconds looking at the code, did it really save any time to make Bill do something that doesn't come natural to him?
