It depends. I avoid CRJ-200's unless they're the only option on any *A carrier into a destination with no nearby alternate airport. I'd rather fly a SF-3 or an EMB-120 than a CRJ-200.

I tolerate the EMB-145's, telling myself, "At least they're not CRJ's!"

I don't go out of my way to avoid CR-7's, particularly if I'm upgrading. And I would prefer the E170 over some mainline a/c.