Both of my labors were a good length, I think. First time - water broke around 5 am, baby born at 12:35 pm. Second time - walked around 3-4 cm and effaced for weeks, labor started gradually after my morning midwife appt, knew I was in labor by 6 pm or so, baby born at 10:16 pm.
I'm having daydreams this time about waking up a little crampy, having my sister (who is a midwife and hopefully will have flown into town just in time) check to find I am nearly fully dilated, and giving birth an hour or two later. Wouldn't that be nice? Or maybe being on our way to the birth center for a regular appt (it's 1 1/2 hrs away), and my water breaking on the way, starting labor...getting there in time to get in the birth tub and give birth shortly after.

Actually my perfect labor length this time will be either VERY short (like an hour or two) so I know for sure there is no time to get to the birth center and decide just to stay home with my sister (this includes here getting here from out of state in time). OR...labor clearly starting but being mild enough for a couple of hours so we can get to the birth center before active labor kicks in, then birthing within a couple hours of arriving. The main point is that I don't want to end up being in the car in transition, or giving birth in the car!