Most Helpful Guy
Hard to say. They all have some good elements and some elements I don't like. The colour in the first two is off, probably from a filter, but it reads as just too much yellow. Makes me want to take them into photoshop and fiddle with the levels. And maybe fiddle with blurring the background out a bit to make the image pop more. All three of them could actually benefit from a different focal length, though at this point you'll only be able to get that affect using photoshop or other post programs.
Outside of the actual 'photo' part, the facial expression of the girl in the black shirt in the second photo is my favourite out of them all. Very coy. I like it a lot. She looks nice in the third photo as well, though the cropping of the second person in that image makes it a bit of a weird photo. The top one just looks like a typical "two friends on vacation" or "two friends hanging out for an afternoon" kind of photo. The second one is more about the people as people, being zoomed in so much more.
My thoughts, anyway. Preference is the middle one. Though as I said, I would like to fiddle with the levels and the blur a bit to make it pop more.1