I switched to Lightroom 3 (from Aperture) a couple of weeks ago and am mostly very happy with it, at least for processing raw photos. However, so far I'm finding its usefulness in selecting and organizing photos rather limited. Since those functions are really the program's reason for being, I'm surprised it's so limited, but perhaps I'm missing something? As far as I can tell, the designers of Lightroom expect you to organize your photos after you've sorted through them all and have chosen your best shots. For example, it's apparently impossible to organize different folders of images on your hard drive under an 'umbrella' folder within LR; "Folders" in LR must correspond with actual folders on your hard drive. I have all of my 50,000+ photos in folders on my hard drive organized by date, but I'd like to be able to cut the cake a different way within LR, putting different dates together under location headings. So if I visited a location three years in a row, I'd like to be able to compare images of that location across years. Now, I could create a "Collection" with a certain location heading, but then I lose all of my stacks. Without stacks, the process of sorting through images for the best shots becomes really messy. It is possible in Aperture to file different projects under folders and still have stacks working within those projects. Is it really not possible to do the same thing in LR without changing the folders on my hard drive? Is there a better way of doing what I want to do? Would appreciate any advice on the matter. Thanks.