Posts: 3,107
Threads: 96
Joined: May 2012
Staff roles: Balance Dev
Considering I've learned some neat tricks in the art of shieldboxing, I don't think there are many shapes that I can't make work. Hell, even the Gallic Miner VHF, the Courbe (roughly the size of a small moon) now has a shieldbox that fits the new norm (for the next update).
The most important thing to consider is that you don't want 'appendages' sticking out in many directions, far from the ship. Tends to be rather painful for the front profile in particular.