Hi, Sonn,
This is such a beautiful walk that it's hard to come up with miss-able places. But I've got a few. I thought the town of Nogaro was kind of dismal, it was grey and kind of charmless. We were very glad we had planned to walk on for several more hours to Lanne Soubiran. We stayed at a farm gite in the middle of the country, very well appointed. It's small (I think there were six of us and it was full). Very nice place, great dinner. We walked a few hundred meters to the local 13th century church and got a personal tour from the people who live next door and have a key. This was 7 years ago, so the info may be out of date but here is the contact information I had:
Gite Monique de San Nicolas
phone: 05 62 08 83 81
(my journal goes on in rapture about the cheese course!)
The other place I just didn't like at all was the city of Cahors. The bridge is amazing, kind of a fortress bridge, and there are some old parts of town that could be wonderfully restored, but I just didn't have the feeling that this was a city with a lot of civic spirit. Everywhere else we were amazed by tons of colorful flowers, here not. It was jut not one of my favorites. Others will undoubtedly disagree, this is all so personal.
Anyway, I'll look through my journals some more to see if I have more places to put in this category, but as I said, the hard part of this camino is deciding which lovely town to stop in, not which ones to miss! Buen camino, Laurie