The Roman Baths are fascinating, and well-presented. I happened upon a free tour of the baths area, which was well worthwhile - particularly as there were only 2 of us there (again, the lack of tourists proved to be a bonus). Informative and valuable. Interestingly, the baths were quite literally lost for about 1,400 years, with their existence forgotten until someone had water coming up through their basement, and a it of excavation later, lo and behold - there are roman ruins here!
Jenny spent the afternoon showing me around the city, which was nice to have a private tour-guide, as well as someone to take a photo of me. I can understand why it is such a popular tourist destination, and I'm sure on a nice day the golden glow of the stone would be spectacular. There is no longer any trace of the medieval city, as the Georgians decided to simply raze the lot to make way for their new city; as a result, we are left with probably one of the most complete and intact Georgian cities.
We took in Pulteney Bridge - one of only 3 or 4 bridges in the world lined with shops, the Circus (which is really hard to take a decent photograph of), and Royal Crescent, which would be stunning on a nice summer's day - but I imagine somewhat more overrun with tourists.