I use to watch it alittle bit when I was a kid but then I grew out of it, realizing that there is races that I think are more entertaining such as Rally, Gran Prix, and LeMans.
Overall, I dont think Nascar is that bad. The only reason I dont like it is because there doesnt seem to be any excitement in any of it. It takes at least an hour (sarcasm) for someone to get ahead of another where as in GT races it happens every second.