I definately like Ava the best. There are many reasons, but the simplest reason is because of the Autolaunch ability. 'm not sure if others have it, but if I need to be able to use another dash for any reason, I just autolaunch into it (as opposed to traveling there through a menu structure like the others make you). It's quick and easy. I also love that it can auto-launch the last program you ran. I tend to run the same thing for a few days then move to something different, so this is great for me. Finally, I like that the programmers really listen to what we want and are constantly working on improving it. I, like the idiot I am, check about every day to see if v0.46 will update. I can't wait till they add the ability to automatically tell me when a new update has been released.
-Izrun