Mass Effect 2 - Interview @ OXM UK

OXM UK chats with Casey Hudson about Mass Effect 2 and a little on ME3.  The conversation mostly centres on some story elements and the dark and mature atmosphere.  Apparently, ME3 will have more humour:

So should we be expecting something even more mature for Mass Effect 3?
[Laughs] Well, we're not talking too much about Mass Effect 3 right now, but the second story in a trilogy is where you traditionally end up in a fairly dark place. The third story is where you try and bring some fun and lightness back into it. One thing we tried to do with Mass Effect 2 was as well as bringing in the more mature stuff, we also tried to bring in a lot more humour so that we can go to these places without making it an overbearing experience. I think we have a lot more fun this time through characters like Joker and EDI. Mass Effect 3 is going to be the epic conclusion... so, a lot more darkness but also a lot more humour.