
Hey, I loved my film camera - it served me well for years! I'm just trying to make the most of my new DSLR!

Actually, I do routinely check the histogram, but that isn't always enough. (I usually keep the camera in the "highlight" mode so that it flashes overexposed regions of a picture.) There have been cases where a pick isn't overexposed, but the exposure still isn't what I wanted - too much or too little. I'm not to the point where I can sense that from the histogram alone. Of course, as long as I'm not too far off, I could correct it in post-processing, but I'd like to get it right to begin with.
I've also had a few cases where the focus wasn't quite what I thought it was. Example: A baby big horn sheep deep in bushes and the focus caught more of the bushes than the sheep, but it was close enough that you had no hope of seeing it on the 2.5" screen - and a higher res 3" screen wouldn't have helped either. I could have zoomed the pic on the camera back, but didn't really have the time. (I was also balanced on top of a wet rock at the time, so detailed investigations of any kind were hardly likely!

).
I've also had cases where I caught more of the polarizer than I intended.
So yes, in general, I agree that there are ways to catch most of these issues using the camera LCD (especially if I had a loupe to block out ambient light). I was just hoping for an even better, faster way.
Thanks for all of the comments!