Some companies are just boring. They operate in dull industries where not much excitement happens. Because of that, they slowly plod along, often paying attractive dividends along the way. However, slow and steady can win over the long term. That's why some Fool.com contributors are rather excited about the total return potential of Black Hills Corporation (BKH -0.83%), Enbridge (ENB 0.60%), and Enterprise Products Partners (EPD 0.78%). While they operate in sleepy sectors of the energy industry, they have ...