Do you have any states you will never hike in again?
For years I hated PA not only because of the rocks but because there's really not much to see. Once you've seen one farm the rest of them all look pretty much the same.
My new least favorite state is Vermont. Did the entire state this year with part of it in July and the rest last week. The rocks aren't as bad but throw in constant mud and tree roots and I believe it is much worse. Having to look down most of the day sucks and when you do get a view it's pretty much the same evergreen trees. My understanding is the Long Trail is even worse after it splits off so I won't be doing that.
No problems with any other state - just these two.