The choice between ETL and ELT depends on your specific needs and resources. ETL is often preferred when dealing with smaller volumes of data, where data quality and cleansing are critical before loading, or when the target database isn't powerful enough to handle complex transformations. ELT, on the other hand, is typically chosen when dealing with larger volumes of data, where the speed of loading data is crucial, and when the target database has the processing power to handle transformations.