I think we can all agree that case style is something that is individual to each owner. Personally, my first and foremost criteria when choosing a case, is to make sure the case has a functional design, that is way more important than looks as my pc sits next to my desk, usually on the floor. Then I look at the cooling capabilities, I want to make sure the case has space for great cooling options, and what watercooling options it has if necessary, then I go for design and colour ( usually black ). After owning a few cases, one of which included the HAF X - Nvidia edition with which I ran GREEN LEDS, ( looking back now I'm like wow...), I can now say that the LED lights in cases do not bother me however they are not necessary for my own setup.
I like the corsair 600t, I think it's got a beautiful design and I'd be happy to use it as my everyday computer as I sometimes have to transport my PC to my place of employment, as well as my mates houses. Plus, I've never really been a " Look at my pc case " kinda guy, theres nothing wrong with that either, for some people it just works and owning such a case allows people to express their individuality better than if they had just bought a plain black box.
As I have gotten to the ripe old age of 20!!!!!!! Haha no just kidding, as I've matured a little, so have my tastes and I realise now that my pc doesn't need to flash or have sound modules or pictures of babes with their tits out to look like a good machine. My pc that I'm building now that I have tested, has a very subtle look, looks good in the office and plays my entire list of steam games which is always growing as I am always on the lookout for great games! Hell, I'm still playing age of empires two, it'd look pretty stupid playing that on a Coolermaster HAF x with glowing lights and fan controllers etc...