Some of the bad things are:
- the default line color, the ticks width, tick length, the fonts
- for some backends, GR for example, the savefig(“test.eps”) produce ugly (wrong orientation) labels, especially when they contains LaTeXstrings.
- size, geometry and placement of legends/title/additional text
- sometimes the ticklabels are cut off.
I know the Plots.jl package is under development, and many of the issues are to be solved soon. I also know I can manage to make better figures within Plots.jl by adding some attributes. I am sure of the better future of Plots.jl. My suggestion is that the developers could offer more beautiful figures somewhere.