I've always used rolling in the past, but my next game will be point buy

Unfortunately, with the multitiude of computer chargen programs out there, it's not hard to end up with a seriously out of balance character if you are willing to hit the reroll button often enough. Which two of my current group did, "rolling" characters with 3 and 4 18's respectively, and no score under 14... I let them keep them, but it can be a task keeping them challenged while not killing off the other three... let's just say the two of them get singled out by the big bads a lot while the mooks go after the rest of the group.