Susan Morris provides some tips for dealing with editors (and how not to deal with editors). For the record, I love all editors, and I've never met an editor that I didn't respect. Nor would I ever criticise an editor, or disagree with them. Never ever forever, strike me down if I lie!
Writing to an editor is intimidating. Editors are these daunting, mysterious figures who work in the shadows, wielding the red pens of judgment, and witnessing the godlike works of Really Good Writers ™ almost daily. They can also say some really hard things to swallow! But your relationship with your editor is one of the most important relationships you will have—right after your relationship with your cat and right before your relationship with chocolate.
Some of the things Susan lists may seem obvious, eg. 'DO be nice', but then we've all thought following guidelines would be easy, and I've heard some horror stories there. In fact, Maurice Broaddus discussed that in this recent interview:
The guidelines are right there. Black and white. Pretty simple. Yet we got everything from full novels to things that couldn’t be classified as stories. But we expected a fair number of “the title says 'Faith' and I’ve been sitting on this story with nowhere else to send it, so what’ll it hurt to send it” type stories. The thing is, for all the complaint about seeing such ill-suited and ill-written stories, they were easy to reject within a few lines. Which is good when you have a huge slush pile.
Do check out Susan's article here: http://www.omnivoracious.com/2012/08/dont-poke-the-editor-six-deadly-donts-and-dos-for-dealing-with-editors.html