I came from a Storm 2 as well. I absolutely love the thunderbolt, but it is not perfect. As many have talked about the battery is going to be hit harder (storm 2 and TB have the same capacity batteries). My TB is just now starting to last decently through the day, after spending some time reading these forums on what other users did to improve battery life (such as not using a task killer, dim the screen, update Blockbuster app and disable updating, etc).
One thing I love is I no longer need the corporate email plan with Verizon. So that saves me some money right there. The downfall is that to get close to a BB corporate email experience, I had to get the app Touchdown, which doesn't completely integrate into the phone (does not integrate into the phone's calendar and very limited control on what notifications can do). You can use the phone's Exchange ActiveSync account type, however you can only sync one folder at a time and that is a big problem for me.
It is a little weird typing on it at first as you will want to push in the screen, but it didn't take me very long to be faster at typing on the TB than my storm. Other good thing is all of your storm's chargers will work, although they officially recommend only the HTC ones.
Enjoy!