Phase 2: Which "Team Up" was your Favorite? (Pre-Age of Ultron)

Well since we have a thread/poll for which Phase 2 film (with an Avenger at the forefront) was everyone's favorite before "Age of Ultron" comes out, I figure we could also have one to discuss about which team up (within these films) ended up being everyone's favorite.



In "Iron Man 3", "Thor: The Dark World", and "Captain America: The Winter Soldier", we've seen each of the BIG THREE team up with someone in their respective films. Most, if not all of these pairings, have been received well by fans and audiences alike, so I'm wondering to see on which duo ended up being everyone's favorite.



Here are the Choices:





1. Tony Stark (Iron Man) & JARVIS









2. Tony Stark (Iron Man) & James Rhodes (Iron Patriot)









3. Thor & Loki









4. Steve Rogers (Captain America) & Sam Wilson (Falcon)









5. Steve Rogers (Captain America) & Natasha Romanoff (Black Widow)











Or was there another duo/pair that I haven't listed down that ended up being your favorite? Discuss.