I agree with others--this *is* an interesting thread.
I'm no chemist and am certainly no authority on alcohols, except for consuming them.
But, I recently had a discussion with the distiller at Black Button Distillery about the "buzz". He's the youngest Master Distiller in the country and runs BB Distillery here in Rochester, NY. He rattled off the chemistry of different alcohols to teach me why there's a difference in a buzz.
Unfortunately, I'm not knowledgeable enough to recite it as he explained it, but it went something like this.
During distillation, three primary alcohols are produced. One has to be removed, since it'll make you blind. Another is often left in, as a money saver for many distilleries that produce a cheaper product. This alcohol (forget the name) is notorious for the hangover you feel the next day.
He was explaining that you can take two bourbons, for example--one cheap and one high end--and drink equal amounts on different days. The cheaper bourbon that's high in this particular alcohol type will leave you feeling sick the next day while the high-end bourbon that had this alcohol type removed will be cleaner. Your "buzz" will be cleaner and your recovery much smoother.
With that in mind, I'd have to wonder what alcohols are produced in a homebrew that produces a different kind of buzz. From what he was telling me, different alcohol types do contribute to the quality of buzz one feels.
Now, our discussion revolved around distilled spirits, so I don't know if this applies to beer fermentation. Someone versed in alcohol chemistry as it relates to fermentation vs. distillation would have to address this.