The new Start Menu is such a huge improvement over what came with Windows 8/8.1 that it's almost impossible to describe the relief. It combines the best elements of Windows 7 and Windows 8. And it's also fully customizable. You can resize tiles in the Start menu by right-clicking them and choosing 'Resize', then selecting a size from the pop-up menu. You can also unpin them or uninstall them completely.
For a while, during some of the Windows 10 Technical Preview builds, you could pin the Recycle Bin to the taskbar, which makes it a bit more like OS X. Unfortunately, that functionality seems to be gone in the release version, though you can still pin it to the Start Menu as a tile.