What is the number one jailbreak tweak you can't live without?

If I were to be completely honest, it would be NCSettings. I absolutely hate it when my phone catches a crappy Wi-Fi network and I have to go into settings to turn it off.

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via i1300.photobucket.com

I use that daily. Not to mention that I use the flashlight ability on a regular basis because I'm a clutz and hit everything when it's dark in my apartment.

Let the games begin!