The 1 and 2 are reasonably sharp and that what we (the customers) are expecting. You seem used wide aperture to blur the background. I don't know what will be like if you put the back ground as part of the photo?
The last one is not sharp, is it cropped photo? Nice pose for the wedding though.
for the last shot - i used a "soft focus" filter on my fm10 (this is from a few years ago) and that particular lense tends to blur my pics some ... i decided that the "softening" effect should be added later instead of trying to use a filter. i have a nikon d80 now and don't use that camera or filter anymore ... but wanted to get some feedback on it. i'm still learning!