There is a very cool three dimensional model of the Appalachian ranges with the AT overdrawn on it at the ATC headquarters in Harpers Ferry. It was really eye opening to see the climbs, and the “big picture” of the geography of the trail.
When we were there some tourists were chatting with an ATC employee. As we walked in, he was telling the tourists that “some people walk the whole AT, and look, theres two of them now!” So of course we got the regular twenty questions, but the tourists also brought us over to the 3D trail model and tried to guess where our toughest climbs had been. They guessed Shuckstack. It was fun hearing them guess how tough each mountain was.
I recall the climb down after Beaver Brook shelter (going nobo) to be very steep. That was at the beginning of the White Mts, going down to Kinsman Notch. Mahousic Notch and Arm were really tough for me because it was pouring rain and I got crabby. So yeah, attitude & weather probably has a lot to do with how difficult a section seems!
jitterbug