Have you watched The First Avenger again since you've seen The Winter Soldier? I hadn't seen the First Avenger in a couple of years. After I saw TWS, I came home and popped in TFA. It felt infinitely better, and I was one of the people that loved TFA when I first saw it in theaters. Winter Soldier was so good that it elevated TFA for me. Characters like Bucky, Peggy and Zola are put in a different light for me.
Oh, and am I the only one that loves the credit titles for these films? Maybe I'm a sucker for the graphics, but I LOVE the contrast between the TFA and the TWS credits. The colorful, patriotic propaganda vibes of TFA vs. the stark white/black TWS. I always have a stupid grin on my face after a Marvel movie, I think their credit sequences are art in themselves. People can say what they want about Iron Man 3, but who didn't dig that 60s Iron Man comic book vibe with the new soundtrack?