Personally, I think the stacker is ugly as hell, unless you replace that side panel. The big grate thing just looks ugly.
I am actually a big fan of coolermaster cases, and I like the plain silver finishes.. However, this one just looks bad.
A lot of people rip on TT, and I can understand some of the bad sentiment. The old Xaser cases were kiddy cases. I bought a Tsunami because of the good airflow, and I liked how it looked.
Yes, they do sometimes rip off coolermaster.. Although not very respectable, it does work in our best interest.. Competition is good for the market.
Yes, Coolermaster cases are usually a bit heavier and stronger, but I feel this is a moot point. You really have to do something stupid to break a case. If you don't break it, it works fine.
As for the flashiness, I don't think all of them are quite as flashy as others. I think the look appeals to some, while not to others. Its a matter of personal taste