No, I doubt this will be my only trip. This is the first leg of my round the world tour I am embarking on! I am setting out on my own, have flights provisionally booked for NZ and Oz after but that's all I have planned, plus the dates are flexible. So my philosophy isn't too dis-similar to yours, I'm just going to do what I want and when I want and I'm sure I am in for a few adventures along the way!
I can understand what you're saying about not seeing everything at once, it would take me 12 months to see everything just in The States I'm sure! I just have ideas of what I want to do. I'm going with an open mind and just seeing what happens. Suppose it's just try the Auto Driveaway option out, see how it works for me and go from there, no harm in trying it out! I am usually a pretty organised person, maybe the feeling of the unknown and unexpected is un-nerving yet exciting!
Where did you stay, may I ask, was it hostels etc? Think that's where I plan on meeting most people, see if I can pick up any travelling buddies!