What I dislike is when I launch a program like Photoshop, which initially opens up it's window, but it then has to hit the disk for about 10 seconds or so before it can really load, so of course, as soon as I launch it, I alt-tab away to a browser window or something else, but then when Photoshop or whatever else it was that I launched finishes loading, it steals focus back from me. It should wait quietly until I'm ready for it, or better yet, when you run a program, it should load whatever it needs to load into memory before opening up its window at all and then when it's ready to give me a usable application, then open up.