Favorite thing: Dol is a possible place to stay if you are visiting Mont St.-Michel. There are simple hotels to lodge at and places to eat. The town has a Promenade with a view of the Marais and there are two fine Off the Beaten Path places (See Tips). There is also a local museum which may be fitted in. It looks a little like a tourist trap from the outside but is cited in the Guide Michelin. (We did not have time to go in, since we had reservations at a place just east of the Mont).
Favorite thing: We found this video hire self-serve kiosk just across the road from our B & B, outside the laundromat. It's the first (and only) time we saw one in France - seems to be something you'd find in a small town without a video shop - put credit card in, choose video, and it comes out of the machine.
Fondest memory: I rather enjoyed the town centre of Dol, with many quaint shops and buildings, and, at the end of May, it didn't feel too touristy at all, just a nice town to explore on foot.