I've been buying shares of Realty Income hand over fist this year. I have been steadily building a position in dividend powerhouse Realty Income (O 1.12%) over the past few years. I recently bought some more shares and plan to do that again this May. Here's why I can't seem to get enough of this magnificent dividend stock these days. A premier passive-income producer The biggest reason I have been buying Realty Income is to collect more of its attractive monthly dividend. The real estate investment trust (R ...