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Your tweaks will be in your cydia account so you can re download them and or use a tweak like app backup.

I recently updated to 6.1.2 with no issues.

All my tweaks work without issue.
 
You think it's a good idea? Will I lose my cydia tweaks when upgrading? Thanks.

You cant update a JB iphone while keeping it jailbroken still.
You will have to click restore in itunes, then rejailbreak it, sync all your stuff back, and then install all you cydia items again.
 
I upgraded and I regret

Cydia is giving me some trouble w some repos like sinfuliphone, moreover, vshare doesn't work anymore, I can't reinstall it from the web... Damn!
 
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