My little hovel, with home renovations its a mess right now. Anyway;
I started with the Craftsman box set on the far right, which had my dad's vintage Snap-On KR56 sitting on it. I bought the set on the left when Sears started liquidating. It was cheaper than just buying the lower cabinet at the time.
I reclaimed a butcher block workbench which had legs that were all bent to hell. First ripped the top down to width (it had been 36" iirc) then biscuit joined and epoxied the end piece to get the length I wanted. It is finished with a Ben Moore water based clear (I forget the exact product), which has been remarkably resistant to my abuse. The whole top sits on an 80-20 frame (wasn't needed top is solid).
I'll be changing this setup out to accommodate a 72" roller cabinet that's 24-25" deep and can store all my tools in one place. Also adding a locker to get rid of one of these gray lockers and possibly the wood cabinets above. The gray lockers are 36" wide by 24" deep, each shelf can hold an engine block or three. These were also salvaged with the intent of refinishing but that hasn't happened.
Rapid Air '1/2in' air distribution going in, adding electric to relocate compressor, adding better general storage, better tool storage.