The 42-year-old actor, who splits his time between Los Angeles and New York City, said during his interview that his current living situation is "kind of perfect."
"That's always been a goal, to be bicoastal in a real way," he explained, adding that while he likes "all the clichés" LA has to offer, it's not as easy to get things done there as it is in New York.
"I mean, I love someone who lives in Los Angeles -- so that's a big draw," Theroux said of his fiancee. "I love the weather. It does feel like a slightly healthier lifestyle, being able to hike and do all that crap."
Asked to list the things that make him happy regardless of where he is, the Wonderlust actor named his dogs "and my lady, of course."
After dating Aniston for one year, Theroux popped the question in August 2012. While attending the premiere of his new HBO show The Leftovers in late June the actor said both he and the former Friends star had "hot feet" about their upcoming nuptials.