We were there during the weekend of Dia de los Muertos (Day of the dead) and it was amazing. Every night before dusk the parades started. Bands would walk the street and people (come in costumes) would follow the band and cheer them on while they played throughout the streets. We followed a band one of the nights and were led to a church which had a video being projected on the outside of it.
All in all, Oaxaca is a wonderful place. It's sort of an artsy place full of tourists and expats. I would definitely go again because it's the sort of city that inspires you :)
Santo Domingo Church - It has real gold inside!
Most of the books were in English but I bought "El Principito"
The view from the Cerro del Fortin