that is a matter of opinion - I find gnome to be incredibly ugly and unpolished. Large margins, padding issues, often badly rendered fonts (fuzzy, weird aliasing) just to name the few.
> often badly rendered fonts (fuzzy, weird aliasing)
Gnome-tweak-tools and the infinality package makes fonts and aliasing comparable to OSX. As with most Linux things, it requires a bit of tweaking. Mostly due to politics and FOSS, as is the case with the fonts.
Newer Gnome apps have clean padding and margins.