Racial differences

Sorry if this kind of thread has popped up before, but since amazon decided to ship my copy of DA:O two days late (so I hopefully get it on Monday or Tuesday...)  I thought I could as well ask while waiting for it to arrive. I have been pondering about the question for a while...

For all those who have played the game, or are during playthroughs:

How much does your race/origin affect the interaction with your companions?
Do they react differently or are there different dialogues and opportunities depending on the race you chose?
Do have some of the companions racial prejudices or talk more freely to you if you are their race? 

Also I'm pretty curious to know if there are slightly different paths of the romances depending on your race. And no, I am not talking about the sexscenes, but dialogues, reactions, uncertainness whether they should romance a person of a different race or not... etc. etc.  Hopefully I am making myself clear.



And I didn't post this into the spoiler-forum for a reason. So please no major spoilers or tidbits of dialogues. I just want to know if there is a difference or not, and if you feel like the race you chose also reflects on how your companions interact with you?