The M3 is the best camera Leica ever made... Yes it's fully manual but and absolute joy to hold and use.
It has some heft and makes any other camera feel like a disposable.
This one is mine with my DR Summicron attached. 1966 so she's a year younger than me.
I also have an M4-P and a 21mm Super Angulon lens. Recently I picked up a 135mm f/2.8 Elmarit-M