I think that Brutalist buildings are quite beautiful, but...  

Had been there a few times as...
Had been there a few times as it is (was) only 30 miles from me. The Tri Corn will always be famous locally as it caused so much controversy. I personally liked it, shame to lose local heritage. The laser quest was great!

Its not the Pills....
Something local to share...Maybe this is up your alley as well...
http://en.wikipedia.org/wiki/Whitney_Museum_Of_American_Art

My nostalgic favorite is IM Pei's Everson Museum
Of course, it's difficult to be objective about a childhood favorite. (Still, it's easily the most beautiful building in the brutalist upstate NY factory town where I was born.)

Everson interior...
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Might I Recommend One Of My Favourites..
Basil Spence
http://www.basilspence.org.uk/

Simon Fraser University
This campus was built in the 60s, I believe. It's a perfect example of how elegant and balanced brutalism can look.
http://www.arriveinvancouver.com/wp-content/uploads/2009/08/simon-fraser...

But what is it we like about ...
But what is it we like about being in those buildings? I like the feeling of being anonymous and not part of the thing, feels like freedom to me.

I think Heath has a great poi...
I think Heath has a great point. I often do feel the freedom walking the corridors. Not sure yet if I feel anonymity, but I do see what you're getting at. I'll have to remind myself to evaluate this on my next Brutalist visit. The freedom I feel, it's a different kind of freedom, freedom that has a purpose, functionalism.
Things I like about Brutalist buildings. These structures are seemingly hardy, opposed to most Modern glass structures, which are seemingly delicate and fragile. I say seemingly because in each case the facade can be misleading. The beauty I see in Brutalist structures is in the forms, textures and rhythms. It's like fabric and in some cases the fabric of nature. Last but not least, Brutalism is a stalwart. It's there, it's dependable. In contrast, a building like Johnson's glass house, from a distant view can seem fleeting and indecisive.