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Are you talking purely visual or are we extending to photographs as well?
In any case, I would have to disagree with you on your point of the object not having much likeness to its common name. The names most often describe some property of the object(s) or perhaps its location.
I can give many examples: Blue Planetary, Ghost of Jupiter, Saturn Nebula, Helix Nebula, Clown Face Nebula, Ring Nebula, Dumbbell Nebula, Sombrero Galaxy, Sculptor Galaxy, Needle Galaxy, Spindle Galaxy, Black-eye Galaxy, Coma Pinwheel, the Andromeda Galaxy, Leo Triplet, Markarian's Chain, Swan Nebula, the Horsehead Nebula, eta Carinae Nebula, the Beehive, the Pleiades, the Southern Pleaides, omicron Velorum Cluster etc.
It is fairly easy to build a large repertoire of objects by common name and have an idea of what they look like. If you can't remember its Messier, NGC or IC number, you can quickly get it from its common name on a phone or tablet.
Of course, if you can remember all the designated Messier, NGC or IC numbers that would be quite impressive!
Regards, Rob
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