A video compilation of Commander William Riker sitting down has recently been going around the Internet. It demonstrates something that I had never noticed before: Riker has a rather... unusual approach to chairs on the Enterprise.
Is there any explanation offered by Jonathan Frakes, or other cast or production members, as to where this unusual maneuver originated? Is it an intentional affectation to demonstrate some aspect of Riker's personality, or just a mannerism originating with Frakes himself?