I use drop bars on my commuter bike. The only advantages I can think of for flat bars are a safer hand-on-brake position, and more reliable shifters (drop-bar

I use drop bars on my commuter bike. The only advantages I can think of for flat bars are a safer hand-on-brake position, and more reliable shifters (drop-bar brifters have to route cables around tiny pulleys, causing the cables to fray too quickly). Drop bars are comfortable for all-day riding.