Interesting to see diff. structures :D
In my case, a high-level structure contains each company and own projects under "personal".
And inside that, each project folder.
Inside each project folder, also some structure, but can vary depends on the technology used:
~/Projects/companyb/projectabc/_DOCS - Project documentation, dumps, csv files, whatever needed.
~/Projects/companyb/projectabc/www - root
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