Not weird at all. I look at cases the same way. It's not going to hold one computer; it's going to have a lot of different stuff shoved in it and it's got to be practical. Simple, elegant, easy to work in: that's the recipe for a long and enjoyable life with a case. The last thing I want to do is build a new box every time I switch a few parts. I upgrade incrementally, and that case is the fulcrum...it's the one thing that remains constant.
Antec from around 2000, big and heavy, and lasts forever? Sounds like the SOHO, which is really a Chieftec Dragon. Look like this?
One of the greatest of all time, if not #1 on that list, and I think it had cost $80. It's the benchmark for cases still today. I didn't ditch it until I met the original stacker.
The CM690 was on sale the first time I got it. Free shipping, $25 off, and ended up to be about $50 (if not lower). It's got everything most need and a pretty kick ass layout. It's not blinged out and is just a great little tower to build in. It's sexy enough for me, but take that with a grain of salt. I love functional cases overall and looks are pretty much my own tastes. I'm not sure if it'll last 10 years since it has a lot of plastic on the outside, but it might. We'll find out in 8 more years
I like the TJ09 (I hate doors after the SOHO/Dragon or the TJ10 would get a nod), but it has it's issues. It's kind of too specific in it's design. It either works for you out of the box, or you mod the crap out of it to make it work out in the long run. The Lian Li 2200(?) also suffered from being too specific in the way it was to be built. It is good, but still restrictive in freewill building methods.
I'm just always comparing it to the OG stacker that wasn't so closed down. You want a 120mm rad? In the back. 2x120? In the bottom. 3x120? In the front. There was just so much freedom to build in the stacker that isn't there on the TJ09. A lot of that is due to the front of the stacker being entirely open. It's the Lego blocks of computer cases, and still run it as my left hand man
Other than those, I just see cases as being basically the same ATX boxes; just with different bezels and bolt-on parts. They're all the same and have this little 8" section on the front/bottom that they toy with to make it different, or maybe some rearranging on the side panel.