What I love about that is that you have long-term goals but it doesn't matter how you get there in the short term. So you can work like a horse for 4 days and rest for the remainder of the week. Or maybe another week you work a little bit 7 days a week.
You don't have to charge by the hour. You could charge by the day, week, month, or project.
With a consulting engagement there's usually a higher expectation of consistent proportional value delivered. It's more transactional (we pay $X we get Y).
As a salaried employee at least in many companies there's some element of the employee being a long-term asset to the company so the pressure is not as high or as consistent.
uhm, well i would put it at more like 33% sales and marketing, 33% R&D&O, and 33% other stuff like HR/finance/administration/etc.
and 1% glamour and glory like going out to drinks to celebrate after a release/sale/hire/investment/acquisition.
sales should not be 80% of the effort, unless you are literally a reseller.