I wonder about that. A couple of the guys I know from college became MDs. They weren't so arrogant and egotistical before med school. It may be a learned behavior.

You should have seen the reaction from the MDs in the room when a colleague of mine referred to the MD as "the easy way to get the title Doctor". He went on to explain it's not like an earned doctorate in other fields where one must do some original work in addition to proving they can suffer through course work and jump through hoops. An MD, he said, is an award for showing up and surviving med school. The rant was triggered by an MD insisting he be addressed as "Doctor" in a forum where most participants had (at least one) earned doctorate in something like physics, math or engineering.