Auc - Is an AUC of 0.75 good?

AUC values are usually interpreted as follows: 0.5-0.6 indicates failure, 0.6-0.7 is worthless, 0.7-0.8 is poor, 0.8-0.9 is good, and anything above 0.9 is excellent. Thus, an AUC of 0.75 falls within the 'poor' range.