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from 2g, upgraded to 3gs/32g, the speaker phone, and volume control is much better as well. love this phone!:)
 
Everything.

The speed of everything -- I booted my device faster then I've booted any smartphone I have ever had.

Video -- not only recording, but editing and the numerous options on uploadin/sending (mms, email, mome & tube)

Compass -- I see it being used in the navigation. On my BlackBerry, my navigation never knows which way I'm facing until I drive half a block in the wrong direction.

Memory -- I didn't use half of the 16gb on my 3G, but 32gb is the same price and I never have to worry.
 
#1 Speed, speed, speed
#2 New oleophobic coating
#3 Video ability / better camera

+1

I love the speed and the new screen coating is pretty cool, stays a lot cleaner than the 3G. The better camera/video is great but I hardly ever use it so it isn't too big of a thing for me.
 
Compass + GPS

I really like the Voice Controls but my favorite is something that may not get used by a lot of people and that is the compass when used with maps. I travel to new places a lot and being able to tell which direction I am headed without walking half a block is a godsend!
 
My favourite thing is not owning one!

Yup, free upgrade next year for me, when the real successor to the 3G comes out.

I'm not even going to touch the 3GS, because sure I'd like a better camera but If i don't know what I'm missing I won't want one.
 
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