Here are a few
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Virtual desktop gadget/applet: I Love the top right corner Virtual Desktop applet, I leave all my important apps in different Workspace(Desktop) and all my Applications Windows do not hide the applet so I can easily Ctrl + Alt + Right/Left/Up/Down to move rapidly to my workspace and I see at all time all the apps that are open ( as my windows are setup to not cover the Virtual Desktop Tool
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Moving from one screen to the other screen with WINDOWS KEY + RIght or Left without using the mouse
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Key BIndings: if you Alt + Esc and type bindings, you'll have access to Key Bindinds and there is so many things we can automate through Keyboard Shortcuts... I was more of a MOUSE guy but getting addicted to do more and more using my keyboard... It is faster
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Access applications very easily and fast through keyboard : Alt + Esc and typing the 1st letter or 2 of the app I need is way faster than using the Application Menu or CLicking an icon at the bottom of the screen
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Not Ressources Hungry : Elive take so few memory and CPU that everything goes so fast and I leave all the time 5 to 10 apps opened in different Virtual Desktop ( WorkSpace)
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Everything, almost is customizable ! So much flexibility !
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Booting / Shutdown VERY FAST !
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VERY VERY STABLE : Very few glitch !
I Am using Elive on a old old laptop and also on my main Desktop i7, 16 Gb Ram, SSD drive and it is amazing... Let's just help Elvie through donation update kernel, drivers, and it will be one of the BEST OS for everyone, period ! 
( I come from the Mac / Windows / Ubuntu World