They're great photos. If you do it again, tell the dude to wear something other than a ratty t-shirt and a stupid braves cap. His fiancée got at least a little dressed up. What he is wearing should compliment what she is wearing. They're not formal photos, but they should still look nice.
they both look pretty casual to me, i was going to comment that i like that the photos/their outfits reflect their personal styles. the compositions are all very nice, and i like the tones as well. my favorite is the last shot.
The only one the hat works for me is in 5, and 7. This is a casual shoot, but cmon guy. My fiancee would have killed me stupid. Alittle color, and your end is ok, considering the guy wouldn't trade his hat for a belt.