Originally Posted by TourDeForce 
You'd be stunned at how often you can take a blah picture and turn it into a WOW! photograph with a little creative rotation and cropping.
I second that. I was 2nd shooter for my brother's wedding and the originals were ehhh because I'm more into landscapes (I warned him I'm not a wedding photog and would not be "in" the wedding if I did this but he wanted extra coverage for the wedding). They liked the coffee table photobook I did for them after cropping, etc. the photos. Most ended up being cropped quite a bit for better impact.
The photos were done using a Sigma 17-70 mostly at f/5.6 (flash of course) and I popped on a 50/1.4 for some low light church photos and a 10-20 for the big family group photos and interior photos when picking up the bride (tiny cramped house where 17 wasn't wide enough).