While I agree with most of that video, most if not all of the boot logo icons and animations you could use weren't supported in iOS 4.x, or 5.x (haven't checked in a while, could be fixed), and I used dreamboard for a while and holy mother of god that was the glitchiest gimmick ever.
Winterboard, sbsettings, my3g, installous, ect do make the iphone much better. Also, the home button on my iphone barely works and it was nice when I could just swipe down to close an app and swipe up to open the app switcher (because, activator is the ****).
For whatever reason I haven't rejailbroken since updating to iOS 5 a month or two back but I'm definitely considering it again if I get bored and want to tweek it some more. Then again, my contract is up on my phone so I might get the galaxy s3 to play around with when it comes out.
On an unrelated note, my big toe nail is falling off. Took a slapshot to the foot over the winter, and the bruise went away and the nail is finally falling off and regrowing. Too bad it looks hideous but whatever.