Glad you had a good time. Del Fagioli is deceiving. If you show up at 7:30, it looks empty, but the two times I've been there every table is full by 9. I really enjoyed it, too.
Regarding the Bistecca Fiorentina, I agree it's not the end all of steaks. I'd never tell them this, but American beef is just better. I do like the technique, as simple as it is. I'll order one to share once per visit to the city, though.
Had you tried lampredotto before? I like it, but the texture is certainly... acquired.
Now you have to tell us your favorite gelateria. Unfortunately, my favorites were closed when we went - Perche No, Carapina and Vivoli.