Well, this is a pretty hard question to answer. But I have to say...My favorite scene is the last scene in the whole movie, right after the credits. c:
They're just all sitting there enjoying their Shawarma. There's no talking or anything. xD
I also love the scene where Hulk plays with Loki mid-sentence. The timing was just perfect! xD
ok to many parts but i'll list the favs! (not in any specific order just ones that i remember)
1. Phil's death : it was sad but hilarious "so that's what it does"
2. Stark realizing where the tesserac and loki is (which is stark tower) "son of a b***h"
3. Stark "I'm bringing the party to you" Widow: "that's a party?"
4. Hulk *whacks thor after killing the humongous alien thingy*
5. Hawk being so cool while shooting the arrow behind him without looking
6. police officer questioning captain America "why should i take orders from you?" Captain america defeats alien guys like a pro police officer: "i need people in those buildings and a perimeter back at 6 ave"
7. Hulk transforming back into Banner and a security guard asking "son r u an alien" Banner says "no" security gaurd "then son u have a condition" LOL
8. Loki yelling at Hulk to stop "STOP! I WILL NO BE PUSHED AROUND BY A GIANT GREEN TH-"
and then hulk whacks Loki around back and forth (LOL that was the good one!)
9. Widow in the beginning when Phil called her in while she was on the job getting intel from a mafia? but it was hilarious how she took care of them while phil was on hold LOL
10. STARK'S MACHINE THINGY THAT TAKES OF HIS ARMOR WHILE HE WALKS SO FRICKEN COOL
11. The ending where loki wakes up n sees the avengers glaring at him n ready to hit him~! "i'll take that drink now"
I thought it was a pretty cool scene when Thor and Loki were going at it on Stark Tower and Thor was trying to be all brotherly, but Loki stabbed him. The REASON I thought this was so cool was because it wasn't super cliche hollywood-like.