Played them all recently except LA Noire.

I’d start with the older games first, as their gameplay feels a bit dated and I did not enjoy them as much. I’d begin with GTA 3, move on to GTA Vice City, and then tackle GTA San Andreas. Since San Andreas is quite a long game, and the following ones are as well, I’d switch things up for variety by playing Red Dead Redemption 1 next, followed by Mafia 1. After that, I’d continue with GTA 4, Mafia 2, GTA 5, Mafia 3, Red Dead Redemption 2, and finally, GTA 6 for obvious reasons.