Work/school or other regular hours
As most of us have certain times of day everyday that we are occupied by things such as school, work or other regular recurring themes. Would it be possible to set a recurring "appointment" that does not hog the space but is used as a backdrop to place other appointments over when they happen during this time.
So basically not a real appointment but just a indication of location at a certain time of day.
This would be especially handy for people that work shifts, so intervals for such events should not be bound by weeks (i.e. Monday till Friday) but should allow for numeric intervals (i.e. Start on the 1st: 3 days time A - then 4 days time B then 3 days time A then 4 days free. Repeat)
You can already drag and drop your events by pressing the ALT button and moving your event. Doing this allows you to copy an event and makes it easier to fill in your shifts. I realize this is not exactly what you mean, but numeric intervals is not yet on our roadmap.