I never saw a town I liked less than Philadelphia.
Could this dislike have been due to the fact that—
Probably in no other place on the Continent was the love of bright colours and extravagance in dress carried to such an extreme. Large numbers of the Quakers yielded to it, and even the very strict ones carried gold-headed canes, gold snuff-boxes, and wore great silver buttons on their drab coats and handsome buckles on their shoes.
And
Nowhere were the women so resplendant in silks, satins, velvets, and brocades, and they piled up their hair mountains high.
Furthermore—
The descriptions of the banquets and feasts ... are appalling.
John Adams, when he first came down to Philadelphia, fresh from Boston, stood aghast at this life into which he was suddenly thrown and thought it must be sin. But he rose to the occasion, and, after describing in his diary some of the "mighty feasts" and "sinful feasts" ... says he drank Madeira "at a great rate and found no inconvenience."
It would only be surmise to state what were the Doctor's reasons for his frequent declaration of dislike for Philadelphia.