If someone were to ask you why they should jailbreak their iPhone, what would you say? For me, the list of reasons could go on for days. The themes, the tweaks, it seems like there are a million ways to customize your iPhone once it's been set free. These tweaks can remove Apple's limitations on things like the amount of sprin gboard pages you can have, or the amount of icons allowed in each folder.
The coolest hacks, in my opinion, are the ones that make multi-step processes on your iPhone less complicated. Don't get me wrong, iOS is so simple a 2 year old could use it. But there are apps like SBSettings that will give you home screen access to settings for Bluetooth and Wi-Fi.
Dock 2.0 also falls in this category, as it makes browsing multiple pages for applications a thing of the past...