I kind of agree, Serang's stye is not my cup of tea. I see a lot of similarities between his Miller and House sculpts for example. And I didn't bite on the Churchill sculpt because I felt they were lacking something in the likeness. I'm not a fan of the 'oil painting' paint apps either - though I have not seen one in hand, so I can't say how well they hold up in person.
But Serang's work is kind of apart from the usual 1/6 fare that values likeness accuracy above all else . He is an artist rather than a replicator, so his personal style is going to permeate through all of his work. People buying these works will value Serang's personality on their shelf as much as the characters upon which his figures are based.
So to those who dig Serang's style and can afford these masterpieces...