As we all know, Android supports alternative launchers. Which one is your favourite? Mine would be Homepack Buzz. It's got so many themes, and it's incredibly easy to make your own. I love it.
Used to be Holo Launcher, but ever since I got an invite to Aviate, I can't seem to get enough of it. It's amazing how it just manages to feel totally inconspicuous once you get used to it.
I use the default launcher that comes with Xperia E3, checked out Aviate now and seems really nice, will give it a try.
Definitely Aviate launcher for its simplicity, situational awareness, and efficiency. Instead of translating your intention into a specific app, and then trying to find it in the pile of stuff you have installed, you go from intention to a context and choose from the available apps - IMHO this is quicker and more in line with UI design intuitiveness.