1. A method comprising: receiving data records containing user feedback regarding at least one offering; from among candidate attributes in the received data records, selecting a subset of attributes that relate to user sentiment regarding the at least one offering, wherein the selecting is according to selection criteria including frequency of occurrence of the candidate attributes, relative amounts of negative and positive feedback associated with the candidate attributes, and time density of feedback associated with the candidate attributes; and presenting for display a visualization of at least one sentiment characteristic of the selected subset of attributes that relate to user sentiment.