Here are my suggestions:
- Blender Amaranth Theme, it is better than actual Blender Dark Theme
- Cycles, because comparing it with Eevee, Cycles is more complete, supports all of Material Nodes and other features and tools in Blender. Also Eevee is a good and modern render engine, but now has got some limitations.
- Full-Screen Mode, because Blender Topbar has confusing layout with Operating System’s Topbar.
- On startup, Render Tab on Properties Editor should be selected, not Object Tab.
- Wrong Blender version branch on Splash Screen.