4-Cute. I like this. It's like he's playing up his actual rigidity and it's being completely diffused by his bride who is cracking up.
5-I'm cool with the quirky crop which seems to suit these people. Not sure about having the foliage occlude his puffball though. Oh, i see: it's a bouquet !
6-I like everything about the shot (perspective, crop, comp, his gaze, her gaze backward) except for the state of his pants. It's a distraction. I probably wouldn't have spotted it if I shot this, but if I did i'd have had him pivot slightly to his left so he wasn't standing so squarely to the camera.
7-This shot is dying to have the ambient exposed -2 stops and for the couple to be filled with an off-camera flash positioned camera-left. Or that's what I would have done.
8-Beautiful. I never do enough occluding with foreground elements. I do wish it was composed with more room for them to look, however.