Biggest problem I've encountered while trying to help people with their phones is data.. so many people I know just turn off mobile data because they're afraid of getting huge bills, or are upset because they're constantly running out of data bundles. Now it's easy enough for a geek to point out that too many apps/widgets, too much surfing etc; will chow your data but the people I've helped often are just fed up and don't want to have to worry about it.
It's the same frustration I've seen with with newbies when 1GB of data used to cost an arm and a leg and people were too scared/irritated/whatever to browse the net except for email.
The problem as I see it is the data charges are just still too high.
I'm not a Blackberry fan (I loves my Galaxy S2) but I totally get why people love them, simple, unlimited data for a flat fee, does the job.
Personally I have wifi at work and home so I leave mobile data turned off unless I really need it.