900 North Michigan, Chicago and 191 Peachtree Tower, Atlanta
 

You don't see too many towers with castle-like multiple spire-like ornaments (technical term) on top, I always thought these 2 really looked alike and shared that special connection, whether you think it is ugly or not - I personally find the style interesting in an oxymornic kind of way.

900 North Michigan, Chicago:

http://www.chicagoarchitecture.info/...chigan-005.jpg

191 Peachtree Tower, Atlanta:

http://www.atlantaarchitecture.info/...eTower-005.jpg

I always liked this proposal by KPF for a tower in Boston:

http://i.imgur.com/iIc6KfG.jpg

They are both attractive, but I prefer 900 North Michigan. The blocking in the windows is far better.

I have a general dislike for both of these towers. KPF's (900 Mich) is detailed better though.

I like an older take on this design, with a good example being the [b]909 Walnut[/i] in Kansas City:

http://farm8.staticflickr.com/7012/6...ef26a8ca_b.jpg
909 Walnut (1 of 4) by jimsawthat, on Flickr

http://farm4.staticflickr.com/3317/3...19e06b04_b.jpg
City Market Skyline 02 by ChrisM70, on Flickr

900 N Michagan is one of my least favorite skyscrapers in the world. 191 Peachtree doesn't look quite as bad.

What about the Liberty Building in Buffalo:

http://i.imgur.com/1v6fOT5.jpg

The granddaddy of them all:

http://farm3.staticflickr.com/2148/3...0d87d550_z.jpg
src

Can't forget Book Cadillac.
http://historicdetroit.org/image/2/3...dillacmain.jpg
http://www.google.com/imgres?imgurl=...=0CFIQrQMwEzgo

The Texas & Pacific Building in Fort Worth...

http://farm6.staticflickr.com/5151/7...5e988f6c_z.jpg
[URL="http://farm6.staticflickr.com/5151/7230993828_435e988f6c_z.jpg"source[/URL]

That is beautiful.