Atari treat: the Tetra tower

A purely personal view, but the tower aesthetic never appealed to me.
There's too much of a 'Beige 1995-era PC dominating and overpowering all before ot' theme there.
I'm more keeping Atari in stock cases where possible, or a smart TT or Mega ST Pizza box. I also like rack-mount and my second Falcon has the Desktopper case. 
I appreciate other people's mileage may vary. I remember an impressive towered Falcon seen at demo parties, could have been Satantronic?

Same here, never shared the fascination of making an Atari look like a random PC. For the technically interested the additional space for extensions was probably another main motivation and added to the "boom" of these solutions back then.
My first STE came in the Desktopper case. I bought it unseen and found it quite ugly when I received it. But it worked well (4 MB, Toscard with TOS 2.06, 2 Floppy drives, external PC keyboard, usable as monitor stand) and in the end it was my main machine for a several years and I liked it for that.
It ended up being thrown away in a semi-functional state when moving 15 years ago, and as one may guess, for nostalgic reasons I sometimes regret it.
However, as a piece of Atari market history it's good to see at least the Tetrax being comprehensively documented. The information will be added on the dev-docs Atari archive pages, too.

Quoting evldhs:

Tower cases are big and ugly. But practical when you shove in all kind of upgrades, harddrives, CD-ROMS and what not. And not to forget, it opens up the possibility to use the fantastic Mega ST keyboard :)
Evil, you're correct on the practical side. 
A lot of the peripherals back then were also lumpy and heavy.
You had the weird situation in the late nineties and early millennium, where people were getting more and more mobile, going to demo parties and Lan parties with heavier equipment and bigger CRT screens.
Until flatscreens came in, it was great weight training, or hernia inducing.