Yeah. I've rolled a handful of 6s over the years, but never a 3. One time, on 4d6k3, I managed to roll a character whose high score was an 8, literally unplayable, because it didn't qualify for any player class.
Instead of giving me a mulligan, the DM bumped the 8 to a 9, so I could qualify for one class. I declined the game.
It's that attitude that I really don't understand. Does the DM not want you to play a character you'll actually enjoy playing?


