They'll say how they love a setting, for an RPG that has no setting. Or they'll say they love a game system, when they are talking about a setting source book.
They are the same chuckle heads that say, "but that isn't how Star Wars works", when talking about Traveller's game system.
Anyway. When someone tells me they love Traveller, it means nothing to me. It's like saying they love TV. I like to know what part of Traveller they're talking about. Make them think about what they just said. It only helps both of us.