Most active apps are located on the right side of the screen, so that it would be easier to access with right thumb. I also like the folder concept, I use it very intensively with playlists. In the latest builds of Groove, it is so cool that you have to tap to folder, tap to album cover and music will start playing without Grove app launching, I think it is very convenient. In contrast, it is not convenient with contacts. I have pinned few people, and when I tap on them, their card is opened first and then I have to press call button to call.