In addition to the excessive padding, what bothers me, is that the typeface choices in Linux are so oversized and ugly. And the way Linux renders Segoe UI is g

In addition to the excessive padding, what bothers me, is that the typeface choices in Linux are so oversized and ugly. And the way Linux renders Segoe UI is ghastly compared to the Windows rendering. If you want a smaller font size, you're out of luck since the padding seems to be assuming that you're going to have those big 5/20 vision fonts, so your buttons have a tiny bit of text in the middle, and acres of space round them.