Golden Sun comes to mind. Interesting, but overrated if you ask me. I still have my friends copies of the sequels she wanted me to play. I'm at the point I would have to replay the first again just to remember what actually happened in the plot.

Technically Brave Fencer Musashi and TWEWY as well, but that's largely because the sequels came out in at weird times and I'm already overloaded with my backlog.

As a twist on this idea. I wish I hadn't played the sequels to Mass Effect. I'd probably have a better opinion of the franchise.