DarkHorizons.com has interviews with both Keanu and Laurence.

For Keanu, though an established success at the time of the original Matrix, he has gone through a lot in the last five years, both personally and professionally. More self-assured these days, he says that although he hasn't reflected specifically about how he might have changed since The Matrix, "I'll just say I'm older and older. I don't know. It's such a hard question. With any experience you have, you know more about yourself in terms of what goes on, in terms of being away from home for so long. Then, through that you discover what is important and there are things that inform you, including the friendships along the way." Including the shoot on the first Matrix, Reeves spent close to two years living in Sydney working on the trilogy, or "basically my whole 37th year working on the last Matrix films." The actor admits that "It was really hard to be away from friends and family that long." But at least it was in Sydney and he defines his experiences in the Australian city as being memorable. "I just loved the city. Great people, beautiful weather, beautiful architecturally and there's good cuisine there. In terms of working that way, and working in film, it doesn't happen all the time, if ever, that you have to apply yourself, go for that length of time on a project. And that's okay to me, especially when you love something and you get the extraordinariness of it. It is demanding in terms of missing your friends and family and also applying yourself to your work for that length of time."

Go to Dark Horizons to grok both interviews in fullness.