You can talk to them about any subject, even the ones they don't know anything about because they're always eager for information which makes them great listeners... sometimes. They do have one of the shortest attention spans. I once was on chat and the Gemini didn't reply until 15 minutes later and forgot the topic we were discussing! Well, did I mention these guys & girls are pretty attractive? They are. It must help when approaching people. There's something about a Gemini though that feels like they're keeping me at an arm's length. It feels to me that I'm a collection in their friend circle than an actual friend to depend on. The advantage of knowing them is that they connect people to others but unless one really tries, it's tough breaking through the many faces Gemini puts up. They change depending on the people and/or person, more so than any other sign. I am starting to realize that maybe the personalities are the Gemini's actual true self anyway.