I agree that phone calls are not the moto droid's strong suite. However, everything else the droid does makes up for its shortcomings in that department. Kind of depends on how many calls you deal with per day. I only deal with less than 20 calls per day. I used to deal with more calls. At that time it would have been an issue.
I'm probably most dissatisfied with the voicemail of Verizon. I'm using a non verizon app for voicemail, at this time. It gets me by, but a market leader like Verizon shouldn't have a weak spot with voicemail. I realize this is off-topic, but it is associated with phone calls of the droid.