If you're like me, you love dividend stocks, particularly ones with high yields. However, you have to look past the yield when you weigh an investment, because all dividends are not created equal. Today, for example, utility SCANA Corp. (NYSE: SCG) and bookseller Barnes & Noble Inc. (NYSE: BKS) both offer hefty payouts, but neither should be added to your portfolio.SCANA delivers electricity to around 500,000 customers in South Carolina, and natural gas to 1.3 million customers across South Carolina, North Carolina, and Georgia.