Laptop bags with a heavy laptop inside can be a botheration if you have to carry it all over the place. A better alternative would be rolling laptop bags that you need not hang around your shoulder.
Although, high quality, rolling laptop bags come at a price premium, but with bags like these, you tend to get what you pay for. When you are opting for such bags, take a look at those wheels and make sure they are either metal or heavy-duty plastic reinforced. The very next thing that you need to check is the handle, which should be extendable and preferably made of aluminum. The superior quality rolling laptop bags have handles made of aluminum metal. The reason being, aluminum is light in weight and one thing you want to avoid is pulling around excess amounts of it. As a matter of fact, the most attractive aspect of having a handle made of that metal is that it is both strong and flexible at the same time. In other words, rolling laptop bags can take a beating and not break or snap off in your hands, which can be of great utility to all those road warrior airline travelers out there. Good rolling laptop bag handles feature a button on the handle which, when pressed, allows you to pull the handle out and upwards. Check the length of the handle. Make sure it is of sufficient length to ensure you are not hunching over to pull it around. The metal handle has to be fully collapsible back down into the bag covering, which is needed when the laptop bag has to go up and into one of those aircraft overhead storage bins. Make sure the bag comes with a separate compartment in it so that you can take out the laptop in a jiffy, when you need it the most.
Last but not the least, make sure the rolling laptop bag come with sufficient padding so that the laptop is fully protected when you are travelling.