All my mtbs have had drop bars on them. I have dirt drops on my s/s mtb and used them on a commuter bike as well. There are several challenges to converting, which have been covered. I used bar end shifters, cheap and easy to setup with my deraileur, and isn't sensitive to cassette sizes, and it also allows for v-brake specific road levers. I have tekros, work awesome. I set my bars high, but I only use dirtdrops so riding the drops is the main position. Generally speaking a shorter, higher stem is used.
And my mtb with v brake levers.