I build computers as part of my computer-fixing business. I've used the following cases:E-eye (the brand was something like that anyway) white/silver nokia-style caseNokia-style silver caseFoxconn TLA-397Coolermaster Elite 330
They're all midi-tower cases (I don't use micro-ATX boards - usually lacking in particular features), and they're in the order that I used them, top being the first I used when I started system building for my business. I was pretty happy with the first, but when I had difficulty getting them for a while, I moved on to the second (well, what I used was a variant of that with a see-through side panel and a side fan). The silver one particularly had issues with dodgy buttons on delivery, but so did the first and a black variation of it too. The silver one was pretty tacky-looking though.
I only built two or three using the Foxconn TLA-397 case. I can't remember the reason for not using it any more, but I think it was to do with the securing bracket for the add-in cards being unreliable (or it didn't fill me with confidence). This was also the time that I moved to choosing a decent PSU instead of a generic el cheapo one. I've also had one customer who bought a PC (not through me) that used this case, the power button broke, so I inspected the assembly of it and it's pretty poor - the customer's finger versus a couple of tiny little plastic clips.
I'm currently using the Coolermaster Elite 330 case. I'm happy with it, except for the power button. I've learnt how to press it in the right way so it doesn't stick, but quite a few customers (I would say 5 or 7 in 20, maybe 30) have broken the power button. Coolermaster have sent me some spares free of charge, which is good of them. Personally I think the customers who have broken the buttons (well, it's the plastic brackets behind the buttons which are the problem) have jabbed the button rather than just pressed it, but still. Customers like the look of it as well, so perhaps I shouldn't be so critical. It costs me about £30, give or take £5.