Music - A Perfect Circle, Tool, Them Crooked Vultures, Queens of the Stone Age, The Mountain Goats, Nujabes, Chevelle, Emancipator, Nat King Cole, Clutch, NIN, Deftones, Rammstein, Die Antwoord, etc. etc.
Books - The Wheel of Time series, The Song of Ice and Fire series, Harry Potter, Robin McKinley, Discworld series, Christopher Moore, Neil Gaiman, Jane Austin, The Brothers Karamozov, Wuthering Heights, White Oleander, The Lovely Bones, and so many, many more.
TV Shows - The Walking Dead, Venture Brothers, Game of Thrones, The IT Crowd, South Park, The X-Files, Veep, Sherlock, Elementary, Buffy
Food - there is no genre of food I don't enjoy. Except raw onions. Raw onions are terrible. And nutmeg.
What if people could fly, but flying required just as much effort as running? Could we start a Fly-to-5K program?
How did Fred and George know how to work the Marauders' Map? And why weren't they curious when they noticed that Ron slept with a dude named Peter Pettigrew in his dorm every night?
Why don't more people recognize the brilliance of the movie Tremors?
How long could I leave my Halloween decorations up before my HOA starts sending nasty letters?
You can hold a conversation. Doesn't even have to be a particularly interesting conversation, just keep the format of one. Like, ask questions and answer the ones I ask you with more than a 3 or 4 word response. People really suck at this, apparently.