Funny, we actually used rolls for abilities when my group first started and eventually swapped to point buy. Point buy imo works better for character creation since you don't rely on luck and get to customize your abilities how you like. The other was array I think? Pre-setup numbers you slapped into each ability, no one really liked array in my group so it was never used.
Array is just point buy that limits you to buying exactly 15, 14, 13, 12, 10 and 8. I find myself sometimes going for these exact values, but point buy is better, because you can also do 3x15, 3x8, something abserd like 3x13, 3x12 or anything in between.
