I never trust the 4d6 drop lowest method. I am fairly certain that most players reroll a lot until they get some nice results - unless, off course, their DM watches them closely.
I would probably do the same, or most likely make up a 32 point buy character (secretely) in that case. Yes, that would be cheating, but I don't care in that case. The whole system feals like cheating to me, anyway...
We had one campaign where we made 30 point buy characters, two with 28 point-buy, and otherwise always use 25 point buy. Yes, it easily makes characters with similar ability scores, but due to the other customisation options for D&D characters, they still never come out alike.
And often enough, when I see 4d6-dl characters, it appears to me as if they always have a 18 or 17 in them, and I think that makes them as cookie-cutter as the typical 25 point buy array (which is often close to the elite array).
I think a lot of the high powered super-multiclassing exotic feat combination powergamer monsters that people fear are a direct result of high ability scores caused by generous dice rolling or extreme point buy value. It is so much easier to fulfill feat and skill prerequisites if your have strong ability scores. You can also compensate temporary weaknesses better with them.
On the other hand, I think in regular play, high ability scores might be seriously overrated.
We regularly play published adventures with 25 point buy characters, and don't have any more problems than groups with higher point-buy value characters seem to have. Maybe we need to fight extremely tactically and need to min/max a bit more than others, but in the end, it is still fun and we kill our enemies and take their stuff just like everyone else.
All that said, I would probably prefer 28 point buy, with an occassional glimpse into 32 point buy, just to see how it is to have AWESOME ability scores.
