Based on my family’s own personal opinions only. YMMV. I could tell you nice things about each of these schools as well but since you were looking for negatives…
Oberlin - Students tried a little too hard to be “different”. Campus was a bit run down compared to most other LACs we visited.
William and Mary - Too homogenous. Too many students from Virginia given state’s required instate percentage makes for a lack of diversity. Can suck to go to school in a tourist town.
Bates - Lewiston isn’t the greatest little city. Campus is on the small side.
Carleton - Very cold. Trimester system. (One of my personal favorites, though.)
Swarthmore - Student body takes themselves a little too seriously.
Hamilton - A little too preppy. Kind of in the middle of nowhere.
Franklin and Marshall - Too much of a greek scene.
Kenyon - Not much around.
Skidmore - Only school we visited (out of dozens) where students told us not to go there.