Like the dog is man's best friend, so is the woodworking bench to a woodworker. But also, it's quite an important tool; without it, your woodworking workshop may lack its edge. It's absolutely critical to choose a quality woodworking bench, either portable or stationary. Both have their advantages and disadvantages, so it's important for you to find out which one is the best for you. Anyway, having a good woodworking bench will make you finish your projects faster, but not only that. It will also ensure your safety at work and make sure you're more accurate.
Some people ask themselves whether they should build it themselves, or simply buy one. However, there is no simple answer. Suffice to say that in either case, there will be some costs associated with your decision. Ask yourself if that woodworking bench you set your eyes on is actually comfortable as well, or is it only appealing to the eye? Test things out and see. You will also have to judge how often you're going to use it and for what occasion. If you're doing your work at different locations and at different times, then obviously you're more than better off with the portable one. Also, it's quite difficult to build such woodworking bench yourself. Even if you manage to, it often won't be light enough.
In the other scenario, I'd go for the stationary version. This time, weight is of not such a big importance, what matters is its height. This is because of the question of comfort, you want your woodworking workbench to be well-adjusted to your size. It's important to always sit in a natural position at all times when working. You have to set the height the same as the height of your table saw. If you still want to build your own, then I advise you to just go to the mall and try out a few for size, so you'll get a rough idea what you're looking for. When you get to the process of building your own, here are some important areas to consider:
It's recommended to have drawers so you can put your tools away in a safe place. Especially if you have children, you don't want them to come near your tools because it's dangerous. It should also have a vice screw and dog holes to assist you with clamping.
Again, remember that it's in your best interest to be more efficient at work and also feel comfortable!