Antique writing tables have their own beauty. The authentic treasures will typically have three drawers along the top, and a place for the inkpot, blotter and sand or powder tray. They are constructed of wood but very often have leather on top as a writing surface.
If you have plenty of room, you may opt for a library or conference table. The true antique writing table was often placed in the library in well-to-do households. These large tables offer plenty of room to spread out books and papers and to meet with clients. Library tables are often found in doctors' and lawyers' offices, as well as libraries, but they will function just as well in your home.
Computer desks in our modern age can run from simple to elaborate. Choose one that meets your needs best. For it to double as a writing table, it will need plenty of space to house both the computer monitor and peripherals (printer, fax / scanner), as well as room for writing and paperwork. L-shaped desks are best because they have additional space to write on. These usually have pull-out drawers for files.
If you have two cabinets of equal height, or even two small tables of equal height, you can place them parallel to each other to use as a base. On top of the base cabinets, place a large piece of wood for the desk top. If you can find two file cabinets to use as the base, that is even better. Then you will have extra storage space for all your files and paperwork.
Another idea is to convert your old kitchen table (any style will do) to a new use as the writing table. This gives you plenty of space, almost like a library table would. It's also the right height to sit at.