There are around 110 million .COM, 15 million .NET and 10 million .ORG domains on the web as of April 2013. Overall, .COM is highly recommended as it is the most widely used top-level domain (TLD) in the world, and most people who use the internet still assume that .COM is the only possible choice. So, make sure you will not lose traffic from those guys who think that .COM is all that’s out there. Besides, choosing a .NET or .BIZ can be interpreted by some people as if you simply lack business acumen to find an appropriate .COM for your business (please no offense if your domain is .NET or .BIZ:)) . The .ORG domains are really good for organizations and non-profits.
If your business cannot benefit from the international audience (let’s say, you provide services to the local community like pizza delivery or taxi business), it makes sense for you to get a country-specific domain. The advantage from having a local domain is that people in your country, which are potentially interested in using your services, will know that they are dealing with a local company and that is what they actually need. All in all, if a recruiting agency operates in, let’s say, the UK territory, the clients will most likely prefer using services of the company with a UK domain rather than with an international one.