I'm only 3-something hours into it so far, but it is just so awesome to continue with your previous character. I'm using Meryl, because character-wise, it made more sense that she would do this instead of Galan, whose only priority was getting the job done so he could go back to his clan. Except now I'm in desperate need of a rogue. D decided to create a new character since his died at the end of the main game (even though you can still import them if you want). He's annoyed that both of my characters lived. He thinks he was more noble or some shit. Hey, I didn't tell Alistair to sacrifice himself for Meryl. Although Galan gave Morrigan her evil baby because he was totally just out to save his own ass.
The best thing, besides having a chest to store all your crap(!!!), is that you get to make OGHREN a Grey Warden. KICKASS.