1980s XT and AT desktop cases. If I could make a modern desktop in that style, I would.
My top 5
1 GEM 386 "Deskpro" Style Full AT (Songcheer or Magitronic?)
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Basically a standard Full AT version of the Compaq Deskpro 8086/386/early 386 style case right on down to the front keyboard jack and aluminum drive rails and rubber shock drive cage. I wish I could find another one. I'm toying with making a reproduction using a metal brake and some plastic fab.
2 Suncheer/Songcheer XT
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my 486's case. I bought this N.O.S. in 2004 and it's been a P233, an XT, and a 486 in it's time with me. It's like a smaller lightweight version of above.
3 XT "Flip-Top" IBM clone (Suncheer/Kingspao/Magitronic?)
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This thing was a joy to work on.
4 Generic Full AT 3 EXT style
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My 286 GEM has this but there seems to be a ton of them still out there. Uses that same panel as the Songcheer XT #2 case so I think these are Songcheer/Suncheer parts.
5 Everex Step 386 Style
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Never seen one in the steel but they look cool as heck with that fancy vertical panel and weird HDD bay on the middle.