Preheat oven to 325°F (163°C) and wrap springform pan with foil.
Make crust: Mix graham cracker crumbs, sugar, melted butter, and salt (optional). Press into pan and bake for 10 minutes. Cool.
Reduce oven temperature to 300°F (150°C) for water bath method.
Beat softened cream cheese, then add sugar, vanilla, and eggs one by one. Mix in sour cream or Greek yogurt and prepare filling.
For water bath, place cheesecake filling in crust and surround with hot water in a roasting pan.
Bake for 1 hour and 30 minutes, then let it sit in the oven with the heat off for an hour.
Cool to room temperature, run a knife around the edge, and chill for 4 hours or overnight.
Unmold, top with fruit, whipped cream, and sauce (optional), and serve chilled.