When creating a character, and specifically when generating its stats by dice-rolling, do you still roll the same number of times when you don't use all the ability scores?
As an example, would a vampire roll to generate 6 ability scores, and then just discard one because it doesn't have a constitution stat; Or, would it only roll 5 scores? This is assuming that the player gets to assign the numbers they roll to the stats they choose.
Best Answer
The PFSRD's Character Creation Outline lists the steps in order:
etc.
That list puts determining ability scores (including rolling for stats) before choosing a race. Insofar as the outline would be considered RAW, your vampire would generate 6 ability scores, then choose to play a vampire and lose their CON.
Pathfinder does address creating characters without CON scores, here (scroll down just a bit to the "Construct" type).
That said, as a GM, I would have that character roll one fewer stats than usual (and, in a point-buy game, would require that they leave a virtual 10 there, rather than selling off the points for other stats). This is what Pathfinder says to do.