For me, it has to be the following:

Philadelphia - Someone here has called the city a pie with an excellent filling covered by a layer of dirt. I'll grant the layer of dirt, but the excellent filling has been replaced by acid. I usually refer to the city as Filthadelphia, the City of Brotherly Love My Arse. I have never seen such unfriendly people as I have in Philly and I grew up going to NYC in the 70s.

Dallas - For all I care, they could cover the city in concrete and it wouldn't look any different.

Memphis - I thought this would be a much more interesting place than it actually turned out being. I lived in the area for two years and still find no redeeming qualities.

As for those who question the left hand exits in Hartford, I might be able to explain a little. Ever notice that when you have jug handle entrance and exit ramps where two highways come together that there is very little room for merging. That's not the case in Hartford. With the left hand exit ramps and the right hand entrances, you don't get the crossing traffic. We always got a chuckle out of the people backing up on I-91 when the realized that they were getting off the highway and didn't want to.