Some people on the phone are planners (like me) and some people are chatters. It sounds like you are a planner. Most people I talk on the phone with are well aware of the fact that I am a planner, not a chatter, because I've been upfront with them (ala ratbastid's suggestion) about my perceived awkwardness when talking to a chatter. It's just one style of communication on the phone. Don't worry about it so much.
