I share neutrals on every thing. [Linked Image]

You ever see a panel feeder with a dedicated neutral for each circuit? (Don't laugh, the electrons behave the same on either side of a panel)

It is purely a design issue, about the only area I will not try to run MWBCs (Multi wire branch circuits) are 'mission critical' type loads like in an IT center.

It's not that it would not work fine assuming you don't load the heck out of each circuit, I use dedicated neutrals in those areas as down the road when changes have to be made you can work on one circuit without effecting two others.

Bob Badger
Construction & Maintenance Electrician
Massachusetts