A couple of my colleagues purchased Droids about the same time I did, last November/December timeframe. One is a technically proficient software product manager whose primary requirement is email management. The other is a business analyst, not technically proficient, who needs a cellphone that does messaging and phone calls for an active social life.
The product manager gave up and went back to a BlackBerry after about a month. Simply put, the challenges of configuring the Droid for Msoft Exchange was just a pita for him. He wasn't interested in the hoops he had to jump through to meet his requirements on the Droid and the BlackBerry platform offered him everything he needed with little or no drama.
My other colleague stuck with the Droid. But without my occasional assistance in recommending apps and suggesting ways to optimize her battery, I'm sure she would have given up, as well. Her priorities don't include surfing the web for new, improved messaging apps, ways to avoid face dialing and unintended hangups, etc.
Droids aren't for everyone.