completely agree, I recently switched to billing by the day for new work and so far it's been a lot easier and my clients seem happier. How often do you really get a task that can be completed in less than half a day (and if it could, couldn't it be lumped together with other smaller tasks that together would take at least half a day)? Billing by the day, or at the minimum half day means I have at least that amount of time to dedicate to a client without jumping between tasks and getting distracted. I still break down projects and estimate tasks in hours, but when presenting estimates for projects as a whole, I just use days. It's more meaningful for clients and it's better for me.