My first phone was a Curve. Fell in love with that. Then the Storm looked really cool even though I was not a fan of touch screens I thought I would give it a shot due to the fact that you can read more faster (larger screen). Touch screens are really not my thing and I couldn't type fast and select text to copy/paste easily on the Storm which was really annoying.
Then I got a Javelin - very nice phone but it didn't have 3G or CDMA. I travel to many different countries so I have to have something that can work anywhere. Sold the Javelin and got the Bold.
Agreed the bold is a bit chunky but in my opinion, it is the best blackberry out there so far. I hardly use the camera and music players and I'm more of a travelling business user.
I just got the bold yesterday and for me, it is the perfect berry! Ahhh, back to keyboards which I can feel and type super fast.
For an almost purely business user (of course I do take pictures but more for on-site work, and do listen to some music) I think the bold is the best. The screen is just the right size.
For me the Javelin is nice as well but because it doesnt work on 3G or CDMA - I had to put it aside although I really liked it when I was playing with it.
Once thing I really liked about the Curve and Javelin was the keyboard. it is much better spaced than the Bold. The Bold keypad is a little cramped but you get used to it.
Those are my thoughts