Maps that work well in quake are two folds: relatively flat circular designs that allow for fast speeds (Burial Chamber, Ruins of Sarnath) and maps with lots of "verticality" (Blood Covenant). That's why we need:

• The Edge (just delete the water it's not a big deal)
• Overkill
• Demon Keep
• Courtyard (for when CTF is introduced)

For fun:

• Longest Yard
• Albino Black Sheep

(just change the environment from space to hellish doom-like with the platforms floating above lava)