Not just what but more importantly ...why ? What draws you to the style of motor that you are currently building , not just " I wanted a rod /custom/yank/sod " but what appealed to you about the particular style ?
My latest ,due to start next year, is a trad style A modified . " Style" because I can't afford the 'right' bits to make it a full on traditional. I chose a modified as I like the freedom it gives you to build compared to say a B roadster where it is expected that it should be built a certain way.
It'll run a 4 pot because I like to use my cars regularly rather than just to go to a show , or be limited in the distance I can afford to travel.
Roadster because you know you are alive in one. Basic transport at one with the elements