I have a private office, but we also work from home two days a week (often more than that as various things come up for people).

I come in to the office every day because my wife stays home with our 3 kids. Work from home when home is four people that want your attention doesn't work out very well. The few times I tried it, everyone just got frustrated that I was present but not available.

Maybe in a couple years when the kids are in school working from home will seem appealing. Honestly a ten minute commute and the entire office to myself twice a week isn't half bad.