As a matter of fact, I am "a graphic designer or something".
And yes, you're right, those sites all look great. In fact I might just print out screenshots of them and hang them on my wall.
But seriously, I know HN is focused on technology, but we can't pretend like there's no such thing as good graphic design and that these sites are just fine.
There are many sites created by graphic designers that look great but have no substance. There are plenty of sites created by engineers that have great information but no style. Luckily, those sites tend to be catered to people who like their pros and don't mind their cons.
Are you a graphic designer or something? You must surely speak for some very superficial, cosmetic issues.
Those websites you mention are mighty fine, especially Go's is very well organized.