I don't really have an interest in cars or conversations that don't go anywhere so DP did little to keep me entertained for it's run time. It was mostly the second half that I was bored with. The characters here just did nothing for me, And the blond stunt girl actually started to annoy me a little.
I wouldn't say it's terrible, I like the first half mostly. I think it has to do with the feeling of having the rug pulled out under me, by the time the story really starts going somewhere all the characters are wiped out and we start over. Essentially I was 'rickrolled' by Tarantino.
Planet Terror on the other hand kept me entertained throughout, as silly as it was. I did squirm a little tho when the Doc was looking up nasty medical conditions on the computer.
I didn't actually notice the crossover characters at first either, Like Earl Mcgraw