We decided not to go.
We decided to not go.
Do you have any opinions on which is preferable?
A.I prefer " We decided not to go."
I don't object to " We decided to not go" on the grounds of its being a split infinitive, but it sounds awkward to me.
In my opinion (and not everyone will agree with this) it's better to chose what sounds more natural and smooth. Sometimes a split infinitive sounds better than the alternative.
See more about split infinitives