I had a Bold 9000 which I liked a lot. But I wanted a new toy.
Captivate Cons
Email
Email on the Captivate is terrible in comparison, part of the solution is to use K-9 or Maildroid, but they don't compare to BB email. This is almost a deal breaker, they need a better email sys, I used to rec. my emails instantly on my BB, and could quickly sort through them, now the whole process is painfully slow and unreliable. You pretty much have to shut off wifi to consistently rec. email.
Speakers
The speakers on the Captivate also come up short compared to the Bold 9000, Even with the volume up all the way it's not the same as before, although the speaker is an upgrade over the curve.
Led Light notification
Another thing I miss about the Bold is the Led light letting you know you have a new msg.
Battery life
All the glitz comes at a price, I used my BB nonstop, you have to be plugged in more with the Captivate as the battery can drain quickly.
Captivate Pros
Swype
I really liked the keyboard on my Bold, but Swype is really cool, so that is no longer an issue, I thought this would be the hardest thing to get over, but I'm fine with the touch screen now.
Apps
There are tons and tons of apps, some extremely useful, some just good for a laugh.
Screen
The screen is beautiful on the Captivate! Movies look incredible!
Memory
16gb built in and ability to add 32gb sd card, can't go wrong there.
Froyo
An already snappy phone will get faster, and better can't wait.