I had my novel edited professionally a while back, and now I've made various changes and tweaks, I don't know whether to submit my work back to the same editor, or hire a new one who'll have fresh eyes for it. Can anyone think of any pros for submitting to a new editor, or for keeping the one I've worked with before? My only thoughts are that the one who's already read my work will already have an insight and preconceived ideas and opinions, whereas someone completely new will take it for what it is. ...thoughts?
Well, the original editor will be in a better position to track the changes you've made in regard to her earlier suggestions. A new editor might have a completely different take and recommend another tear-down, which may or may not be a bad thing. If you're happy with the original editor I would stick with her. Might even be able to negotiate a better price too, since she's already been paid once and freelancers love repeat business. A new editor will take longer and would cost more, I would think.
I would hope that a professional editor would be able to look at something objectively. This isn't your friend or writing buddy who's beta reading something for you, after all - this is their job. But, I don't have any experience with this particular process, so ... grain of salt.
I'm a professional editor (non-fiction) and also do a lot of beta reading (non-professionally). In both cases I think I'm much less useful when looking at a manuscript the second time around. You can't get a first impression twice, and it's first impressions that matter to readers and industry professionals alike. I would go with a new editor.