If you're comfortable skipping DIS Jr and Mermaid, then there's nothing wrong with that. Obviously out of the shows that you've seen, you can pick your favorites and just see those. I really enjoyed LMA the first time I saw it, but once you know everything behind it, it sort of loses it's re-watch value. That said, if you haven't seen it before, I would recommend watching it at least once (especially because who knows if it'll even be here in a few years!)