My favorite houseplant is my rubber plant. I purchased it just after I got married, and we didn't have any money for stuff like houseplants, but for some reason I had to have THIS plant. The leaves are a dark blue color, which I have never seen before or since. My husband begrudged the plant for a long time and I think the plant liked that so it thrived.
For a few years, we lived in apartments without a balcony so it stayed inside all year. Now it goes out on my covered porch all summer. I cut it back when I'm tired of walking around it and root the cuttings in water. I'll be pretty sad if it ever dies. It's like a pet!
A few years ago, I got a fiddle-leaf fig and I'm hoping that I can figure out what it likes, it's far more tempermental than its cousin. The leaves get brown on the edges during the winter but it does fine in the summer outside. Probably loves the Baltimore heat and humidity!