This midstream energy leader looked too good to pass up.I recently went on a shopping spree. It wasn't to the local mall. I didn't buy online, either. Instead, I put some of my cash to work by investing in several stocks.Enbridge (ENB 0.91%) was one of them. It was the first time I invested in the Canadian midstream energy company. Here are three key reasons why I just loaded up on the stock.1. The dividend (of course)The headline of this article gives away a major reason why I bought Enbridge: It's the div ...