Is there a way to make the "delete photo from disk" a default when pressing backspace? I use the catalog also to select the photos and I don't want to keep all the originals! It would be ok even if the pre-selected option was the one I want, so that I could just press backspace and then Enter...but now the pre-selected option is remove from catalog. This means that every time I have to use the mouse when choosing which photos to keep. When you have 1000-2000 photos a time it's super annoying!
Don't press Backspace, press 'X'. That marks the photo as Rejected. At the end of the reviewing process, you can then delete all rejected photos at once with a single extra click. Lightroom even has a menu for deleting rejected photos.