I love drag racing for the technology, noise and speed; plus its relationship to, and derivation from, real street racing. A NHRA fuel engine churns 6000+ horsepower, more output in one cylinder than an entire Winston Cup car. You cannot fathom 0-100mph in 0.8 seconds, 0-325mph in 4.6 seconds unless you've witnessed it up close. The driving skill may not be world-class, but the tech is incredible.
NASCAR? Boring technology (pushrod carbureted V8s), mediocre drivers.