I like the #3 icon the best, #5 font type and color scheme the best. If there were a way to make the icon more indicative of the function of the app, I'd prefer that. The design combining four photos into one image is leading because of it is a great analogy for the app function.
If there were a way to make the icon more representative of the purpose of the app, that would push #75 into first place. At first glance, it just looks like five squares.
Try to look at #6 or #86 for inspiration. I really like how those designs illustrate the concept of combining multiple photos from multiple sources into a single album.
I like the update in #135, but it feels like the blue background no longer fits with the multi-colored photos. I'd also like to see the center black photo enlarged relative to the others behind it. Lastly, the font and color scheme used for the text in #5 and #175 are what I've liked the most about your designs, please keep that constant.
#160 is my favorite. I should have been clearer: I like the fact that the "n" is a different color in #5 and #75. Please incorporate that into #160. I'd also like to see #160 against a white background.