I try to use traditional woodworking joinery in my furniture as much as possible. My favourite joint has to be the “dovetail” joint. Below are two examples of this type of joint. The first picture below is hand-cut and known as a half-blind dovetail joint because it can only be see from one side whilst the second picture is machine cut and called a through dovetail joint as it is visible from all sides.
I cut this joint by hand on some occasions and other using a router and template. The link below to the wiki gives more info on this joint and shows just how reliable this joint is!!