There are some great sidequests in Starfield. I started the game by just playing side quests and completely ignoring the main ones and it was awesome. I loved the Ryujin questline because I had a sneak-build and it was nice to just not be seen and wreak havoc. The one about the 200 year old starship and the AI ship were also pretty good.

But then I did the Sarah romance questline which was written like a fanfiction by a twelve year old...and continued doing the main quests which were just like Skyrim in space. Starborn...Dragonborn...ugh.

The first 40 hours were a solid 8/10 for me. Once I started doing the main quests, it dropped to 3/10. And the loading screens are just annoying after a while.