I think its really cool how each of the companions has its own special perk that can help you out too. Im going with Rex (because I always have to go with whatever dog companion there is) and Raul (because Danny Trejo is badass).

I was already going to get Raul, but now that I know he's voiced by Dany Trejo I think I have to [censored] myself

I'm not getting Boone, we have way too many super hero characters already, but I think they did a great job with companions, you can get the one that compliments your characters personality. I think I'm getting Raul, just because him in his Vaquero outfit will be so cute.

I really hope there'll be dogmeat, if not I'll have to settle for a robot dog

I am definately going to take the purple old lady supermutant (her name was Daisy, right?) and Raul.

Chances are I'll be recruiting Arcade or Cass.

I hear tell that if we rise to a high enough rank in the Legion/NCR, we can have a Legionnaire/Trooper tag along. I will most definitely take one of Ceasar's men with me on my travels.

ED-E, I'll get around to the others eventually for their quest line, but ED-E will be my main companion.

We already have an open discussion for this over in the spoilers section. Please use that one:
http://www.gamesas.com/index.php?/topic/1121233-which-companions-will-you-choose/