Echoing others here mostly.
Hollow: best slicing performance for a given grind height, thinnest and weakest grind.
Flat (v-grind): good performance, more stout than a comparable hollow grind.
"Saber": just the term for a low flat or hollow grind. I avoid these.
Convex: can cut terribly or really well depending on how they're made, and will have correspondingly excellent or terrible durability, respectively. No such thing as a free lunch with a convex grind.
Flat (chisel): Just a v-grind tilted to one side, with the same inclusive edge angle as the v-grind for a given grind height and stock thickness. Aside from specific cutting tasks (like where you're parting small slices of soft material away from a larger item and need the small pieces to stay perfectly straight, as in cutting sashimi), these are less useful than a regular v-ground knife. They should be paired to a user's preferred hand but they're usually backwards for reasons of aesthetics, making them even less useful. A lot of bad, nearly mythical attributes to these that are not based in reality.