Exactly. Most women have a very different definition of curvy than the definition most guys have in mind.
Most guys would agree that she is curvy. But I can guarantee that most women who describe themselves as curvy do not have anywhere near Hendricks' proportions.
I tend to agree. Of course it's possible for an overweight person to be attractive, but in general that is not the paradigm of beauty in the West. I can't think of anyone I've seen who is overweight, who would not look EVEN better if they were thinner.
I don't have a particular type in reality - I've fallen hard for a couple of girls who in hindsight were conventionally plain - but in the abstract I'm more likely to be interested in slim Kirstie Alley than the overweight version.
Individual taste notwithstanding, when I hear this "big is beautiful" stuff it tends to sound like someone protesting too much. Unfortunately it's a brutal fact of life that there are some traits which are generally held to be less attractive than others, being young and in shape are going to see you rated higher in general than being older and overweight (and I fall into both those latter categories myself).
Anyway - back to the subject. I don't have a strongly held preference. I don't like painfully thin women, but I suspect I'm talking thinner than what the OP means by skinny. If I had to choose it would be Christina Hendricks I suppose.