My recomendations:
The Pooh quote goes with the picture. So that seems like a good theme to follow throughout. Perhaps you could find quotes that go with the movie scenes that you're using? Or the other way around?
For your first postcards, the second layout is much stronger with the characters looking up towards the text. Are there other images that you could select from for this image?
Same thing (sort of) with the second postcards, this old man still has teeth, so it just feels like the image and the quote don't really go well together. It's cute, but I think you can find something that fits better. The placement of text works well in both layouts though.
In the third postcards, for the smaller layout, I would just photoshop out the hunny bucket on the lower right. Just have it so that Pooh is looking down on te text. The cropped bucket of hunny is distracting and doesn't add anything.
Overall, I would consider having a consistant typeface throughout the postcards. This would help them all function as a group better. In the first and third groups your images are also based in blank backgrounds. This is a clean and consistant aesthetic choice. Consider picking a new image for the second group so that it thematically fits with the first and third groups.
One last final note, your browser says that this page is "Fight Club Quotes"... you need to remove that from your code. It is confusing and not accurate.