NASCAR is so boring its painful, the guys that usually win on the ovals are the ones with the best teams, other than that its mostly down to luck who wins, this has been said by many NASCAR drivers themselves so argue that point all u want I don't care. The best drivers in NASCAR are the ones who win the road courses, most of the American drivers fall apart at the first sign of a right hander, which is why its mostly international drivers winning road races, while the local drivers win at the ovals (mostly). I find any touring car series really exciting to watch as they're usually closely regulated so the races are very close and the drivers don't mind a bit of rough and tumble. My favourite series is formula one though, because its always been at the forefront of technology and has the best drivers in the world. F1 can be extremely political though, which is its only downside, as sometimes the politics gets in the way of the racing.