In general, I like a clear, uncluttered space on a computer screen, one which is easily and clearly legible.
That means that I am not in favour of uber-fancy screens, or the provision of 'bells and whistles' merely because one can supply them, or can offer them.
For the record, I don't think that MR is 'ugly'. I think it is plain, which is a different matter.
While it might be more attractively designed, what matters more to me as someone who wears glasses and dislikes screen clutter, is that it is legible and clear and easily navigated, and the site, as currently constructed meets that need admirably.