Inquisitors come in all shapes and sizes. I've always been fond of those in the Eisenhorn mould - radical-leaning and a bit world weary. Those with a more subtle nature rather than being god-like warriors.
One of John Blanches concept sketches for a veteran Inquisitor from The Inquisitor Sketchbook really stands out to me:
Here is an imposing character in a commanding pose. He carries a cane almost as a mark of office. I love the echoes of Don Quixote and that slender bionic arm.