I generally like #! default look, but there's a couple of things I absolutely must configure: I must use only fonts tat can be rendered as bitmaps (terminus, tahoma, verdana), I can't stand others. And I need a bit more contrast on the colorscheme overall.
This is easily done but it gets a quite boring if you install a distro a few times.

Would it be possible to have a set of custom styles that one could choose for example during the initial set up script?

Not just OB styles, not just gtk styles, but everything packed together in some way:
-ob, gtk, tint, terminator, etc.

Many people in here love to play around with such configs, I don't So maybe, those who do like could come up with a small project to do the hard work for the lazy ones?

Just an idea I had...