Vhalkyrie wrote...
First playthrough was Anders, Carver, Varric. I didn't know what was going to happen to Carver. Actually, my first party didn't have Carver, I picked Aveline. Mother begged me not to take Carver, but he made such a stink about not going when I left him out, I changed my mind. I reloaded the game to take him with me.
I was quite amused when I got the letter from him in the Grey Wardens telling me it was my fault. I was like, "Actually, I reloaded the darn game for you!"
Brothers. 
haha, that's almost exactly what happened to me too! I'd read some thing about your sibling becoming a grey warden, but I didnt really pay attention to it. Was going to take Fenris (I'd only just gotten him and he was awesome) and Anders (He's a GW after all), and then Carver was there too and was like "pick me, PICK ME DAMNIT" and gave me all these rivalry points when I tried to go with my boys. And that bugged me so I reloaded and made him happy....and then he buggered off for the rest of the game as a Warden so it didnt matter that I'd made him hate me slightly less, BLAST.
"Yeah Carver, its totally my fault that you're a GW. Next time I'll just let you die. SEE HOW YOU LIKE THAT INSTEAD"