Some collectors like art deco models. Other collectors like Electrics. Still other collectors prefer only solid gold models. There are definitely plenty of themes to go around. One very popular genre are the asymmetric models. Asymmetrics span art deco, electric, automatic movements, and all case materials as well!
Some might question the art deco statement but I'd invite you to check out the Spur, or possibly the Brooke.
The late 1950s and early 1960s was the golden age of asymmetric models though and there are no finer examples than the Flight I and the Flight II. Both models have very similar designs that differ in case material - solid 14K gold vs 10K gold filled and by dial pattern.