form factor is a biggie ( its big but not too big of a smartphone), qwerty , easy transition for me to move my apps from n96 ( very similar in terms of memory etc) , just the overall fact your owning the flapship of Nokias ( you've got the best of the best)
To be fair, look i m a businessman and I need as much organization and power and performance in my choice of cell phone. I know that nokia can deliver the best combination of PDA and call quality and features for my needs.