I liked the Start Screen of Windows 8. Efficient to use and neatly displayed everything I was likely to launch without having to waggle a mouse up and down a menu searching (I could fit sixty neatly categorized icons on my monitor quite easily and who has more 'commonly used' programs than that?) After a bunch of faffing around, I managed to get Windows 10 more or less back to how Windows 8 was so I'm happy enough with that. Hate the unnecessary framing of Metro apps, however. I don't need a little X in the corner to close something. Firstly, closing something is less important than it used to be. Secondly, I can just drag it down to close or hit Alt+F4. I hate that they backtracked on everything to placate the learning inhibited - give me back my screen real estate without distractions.
I never missed the Start menu when they took it away and now they've brought it back even uglier. Stupid Microsoft.