I have grown fond of Picasa in Windows, so much that it had replaced Photoshop as my photo editor of choice. The straighten tool in Picasa is far better than Photoshop and the sharpen feature in Picasa is also superior to Photoshop. On top of that, if you want to create an 8x10 image or a 5x7 image for print, these features make it easy to resize for print.
I have recently purchased a Mac and while I have Photoshop CS for Mac, I miss the features of Picasa and easy of use. iPhoto has been a huge disappointment and I have actually grown to really dislike it. I store my photos on an external drive and iPhoto wants to import them onto my internal drive and reorganize them. It is quite fustrating to say the least.
Anyway, I would like to hear some feedback from Pbase users on what you think the best photo editing software. I am looking for an application that can resize for print, has good straighten, crop, sharpen tools and doesn't require a total reorg of my 10GB catalog of photos.