I'm a 1, 2, and 6.
Whether it's $4, $2, $1, it's still a place to cut costs. And I get this gut feeling (as I'm sure others may) that once, and if, I get comfortable with the current trend, the stuff will hit the fan in some fashion and we may be back at the $4-$4.50 mark again.
But the best one for me was 6. I find it cool to judge a vehicle on something other than brute power and 1/4 mile times for a change. I'm sure I'll have another beast at some point (it's in the blood), but for the grocery getters I like the challenge of seeing just how far I can realistically go. Plus I dream one day of telling folks I get 30 mpg in a Caravan!
Aaron