First you'd need to consider what you're using it for. Exercise bikes can be very different from commuters or casual ride bikes or velodrome racers. Another consideration is budget: bikes can range from a couple hundred dollars in price to several thousand. Accessories can dramatically increase the price as well.

For general, all-purpose bikes you may want to consider a commuter bicycle. It would have a wider, thicker wheel than a road bike so it would be a little sturdier for urban roads. They tend to be a bit heavier, so there is a tradeoff.