My husband and I were very young (unplanned) parents, so we didn't discuss parenting issues beforehand. Fortunately, our son was a very "easy" baby and my husband and I are very much on the same wavelength.
Since then, yes, we discuss issues as they arise. If there is a discipline issue, we will usually send children from the room while we discuss it. We believe it is very important to be on the same page of music. We now have three children. Our biological son, and two children from intercountry adoption (as school age children, not babies). We have had to adjust, amend and alter our parenting styles to fit the children and the situation.
Parenting is NOT a "one size fits all" sort of thing.