I dislike point buy because it creates characters with stupid stats. Dump stats are stupid. Having my character lack any personality, force of will, or sense of self just so I can survive is stupid.
That being said, rolling shitty stats is just as stupid. I've done both.
Really I lean toward the view that having bad stats is really lame, and they aren't that big a deal anyway, so I tend to favor rolling with a very high-power arrangement (Like roll 12 times, take the best 6). It's never that I want mad power, I just get sick of roleplaying retards or otherwise wildly one-dimensional characters. If you use point buy, you are going to dump one or two stats and if you roleplay that stats you end up being a one-dimensional dweeb, which is usually going to make you comically bad in one area. I would rather just have a 10 or 11 in those areas.
If point-buys started at 10, I don't think I'd have a problem with it. Starting at 8 creates all kinds of annoying issues with how you roleplay and how your character interacts with the world. Everyone plays differently, but generally speaking they all let a character's stats influence their view of the character in different ways. So it sucks having that 6 or that 8 right there, because everyone zeroes in on it and gives you shit when you don't act that stupid or that reserved. Everyone also has a different idea of what each stat means, so that 6 in Charisma means you're ugly to one group but just means you have no personality in another group. It doesn't matter who's wrong, because you aren't going to waste the group's time arguing with them. Give me "average" any day, please, because at least then people don't expect anything of you. Point buy almost guarantees that people will look at your stats and decide how THEY want you to roleplay, and you're going to catch shit at one point or another. Like the view or not, what you end up with is a waste of time.