Now this is a very hard question to answer and there will be many different answers depending on who you ask. Simply put, it is best to keep the voice cabling terminated as normal on 66 blocks and the data cabling terminated as normal on patch panels. This setup is displayed to the right. It is hard to see but the voice cabling is terminated on the 4 blocks under the phone system. The data cabling is all the way at the bottom, almost out of the picture, on a patch panel.
Now, there will always be exceptions to this rule. When you are in a smaller office with less than 10 computers sometimes it is more cost effective and cleaner to just have plugs put at the ends of the data cabling that plugs right into your switch or router. However, there are some larger companies that need to have their cabling terminated to patch panels so for ease of troubleshooting and administration. However, you also have to take into consideration how you are going to keep all that cabling looking nice if you do go the route with patch panels.
In theory it is a very good idea to have all the voice and the data cabling terminated to a patch panel. It helps with the adds and changes that every company makes and can (I use that word very cautiously) save money for the company. However, it can also end up looking like a complete nightmare if not properly executed. You can see some examples of these nightmares by clicking here.
If you truly do want to go with the patch panel solution the best plan is to purchase a rack that will house all the patch panels and cable management. This solution will allow you to have the ease of management that you are aiming for while still keeping things looking neat and professional. Here is an example of what I am talking about. If you neglect to get a rack and you decide to use the 3-4 inch deep mounts for patch panels your cabling will get ugly real fast and your ease of administration that you thought you had will get ugly really fast.