im a roller. i have always hated point buy . . . more so as i have gained gaming experience. the peak had been 3e. there are just too many options out there, and i would take hours deciding on points. i just roll my stats, down the line, and use what i get to decide what i want to play. who would ever play a wizard with 14 int and 18 str with point buy??? random rolls also keep more options open as opposed to point buy (unless youre doing high point totals), like the character i had that ended up being a rogue/wizard/fighter/spellsword . . . if i hadnt rolled really well for her stats, she wouldnt have been viable, and she was a blast to play.
a player i dm'ed, usually a min/maxer power gamer ended up with a cleric with dex & cha 8, which never would have happened if he was using with point buy. that character ended up founding a religion and became an icon of the campaign world. (and that players favorite character)
generally, i just find points too artificial.
i have condidered using point buy when i dm, esp after reading this thread, but my players are so used to the *possibility* of great scores, they would insist on a lot of points. to many. i may play with the point & roll stuff youve been discussing here, though. that definitely has possibilities.