here is a quick list of the tweaks running on my ipad2, that i can't live without.
Alwaysarrange (lets you move the icons around without having to hold down to go into wiggle mode)
Applocker (I use this to block access to some things for my kids, it can basically password any folder or icon)
Activator (no brainer, its a requirment and adds alot of functionality for gestures)
Winterboard (allow for custom themes)
Black Ups Darkness Ipad (Custom theme, one of the best for ipad)
Doubleat ( allows you to set an email address in the settings, that will auto type when you press @ twice. awesome tweak for when you have to sign into email, facebook etc)
iFile (obviously it's a file explorer)
IkeyWi for ipad (AMAZING.. can't live without it. Adds a customizable 5th row to your keyboard. I add keys for .ca .com .net etc..)
iSHSHit (easy way to backup your shsh blob, which you may need for a restore or a downgrade at some point. Cydia backs these up automatically, but it's nice to email yourself a copy too)
multiiconmover (name says it all, allows you to move multiple icons at once)
Quasar (multitasking app, allows you to adjust app size so you can have multiple apps running in front of you )
Scrollingboard (allows for unlimited apps in folder (default is like 20, then you have to make a new folder) and also allows for a scrolling dock, which is awesome)
SBSettings (allows quick access to toggle just about anything off and on and reboot the device)
Software Update Killer (obviously blocks the phone from showing updates which will remove your jailbreak)
Springtomize (too many features to name, you really have to explore this app, it does just about everything you can think of as far as customization goes)
Swipeselection (you'll have to youtube this one, it's hard to explain, but allows for easy highlighting characters in notes)
Xbackup (easily backup all your cydia sources and tweaks)
I have more recommendations, but they are for a pm

Send me a message if you need help.