Best live wallpaper

Solar System 3D is really great. Even the free version, Solar System Lite. When you touch the screen you can change the 3D perspective. You're gonna want to leave one home screen completely blank so you can play with it. Even 'though I don't use a live wallpaper, I went ahead and bought the paid version (only $1.43) just to throw the creative developer a little bit of support. It's a battery hog, so I use it for entertainment and education with my kids.
 
little offtopic but just wondering if live wallpapers have any huge effect on either the battery or the performance of the phone?

do they still run when theyre in the background?

At the end of my battery, I've never seen a live wallpaper use more than 3%. Not too bad, IMO.
 
The Vortex Galaxy, Inferno Galaxy, and Ice Galaxy wallpapers all look great.
I prefer Vortex Galaxy. Looks great on the 4.3in screen.
 
My 2 favorites are City At Night (not using the time/weather widget) and the Thunderstorm live