Your favorite rear end/final drive ratio and why?

The car in my avatar was the most fun with 3.55 gears.It was a heavy BB car. Tried 3.73 gears but preferred the 3.55's.
I ran a couple of big block chargers with 4.10's for years but I just don't like the higher cruise rpm anymore.

I bought my old 68 Chrysler 300 back and it has 3.23 gears.Going to leave it alone other than adding a suregrip.

I just bought a 72 Duster with a 440 and it feels like a 3.23. I will probably leave it in there until I am done with the heads/cam swap and see if it wants more. 3.55 is as low as I will go. Mine are much more street than strip these days.