I've never experienced "trying" for a baby. both kids just kind of happened. I really hope when we have our 3rd and final baby we actually get to TRY. I want us to be able to decide "hey its time for our next kid" then be able to take the time to get a new house, and new car (our house is only a 3 bedroom, and my car can't fit 3 carseats across, since my oldest will be about 6 at the time she'll still need a carseat) then start setting up the nursery while we try for our 3rd baby.
I don't want to wake up, take a test, then rush for 9 months to get our life situated for a 3rd baby.