Favorite gear ratio for street car

A 4.10gear with a tall tire has the same rpm per mile as a 3.90 gear with a short tire . Likewise a 3.90 gear with a tall tire has about the same rpm per mile as a 3.70 gear with a short tire . Can you see where I'm going with this ? Much easier to change the height of the tire than the ring & pinion to find the sweet spot . If you live in the mountains I suggest a 3.90 gear so you can vary the height of the tire for hills or flats . Good luck , happy 2021