I think you might as well just say the original adaption usually is the best. (the massive hordes of horrifying film games are proof of that)
I like long walks around the park.
Original work you mean. But otherwise you're 100% right in almost every respect.
It's just from my POV, visual novels > anime > manga in terms of medium. VNs offer the most flexibility, and can become manga or anime depending on the need, while anime with its colour/voices/music puts an edge over manga.
I looked into a visual novel once but it felt too much like a choose your own adventure book and the choices I made never turned out the way I thought they would so I gave up on it. Am I lazy? yeahā¦ I suppose so.