No.Seems like a cop out if someone votes R or D for every major election of the last few cycles yet chooses centrist or libertarian. If you voted for Obama twice and a Dem for Senator and House Rep. then own that shit.
I always vote straight ticket D, but that's because the R's are fucking crazy and can't be allowed in power. Now, that being said, this very morning I find myself listening to NPR and hearing about some gun control laws being passed by the Colorado House and there's an R Rep on there saying that "These are bullshit, they're not gonna stop anyone from being killed, and all this is is feel good legislation that's not gonna change a thing," and I agree with him.
Just because D is the centrist party now doesn't mean that there aren't centrists. Make no mistake about it, if the major political parties were actually on either side of the center line, I wouldn't be voting straight ticket D.