Personally I dm with rolling, but allow to reroll a single total to curb out the pesky double 8s. (and allow keeping either total, if you happen to roll lower than originally)
I find the results more interesting, than rather stale point buy :p
When I DM my rules are you roll one character 3D6, and can reroll one dice (so if you roll a 6 6 1, you can reroll that 1). If you don’t like what you roll, then you can point buy.
