Honestly, I like all types of bodies you've listed. I know you probably don't want to hear that answer, but it's true! I've felt extremely attracted to very slender girls, curvy/"thick"ish girls, among others.
As I said in another thread, when you take in a stranger's looks, you're looking at the whole picture and how it's combined. Things are never fixed. For example, I have imagine how some skinny, small breasted women looked if they had bigger breasts and I didn't really find them as appealing as if they stayed the way they are (shocking, I know).
We're all built different (obviously) and it's the diversity that drives you to want to find a new, attractive person to mingle with. This is why I can look at a skinny, pretty girl and think "wow" and 10 seconds later see a thick, pretty girl and think "wow" just as much.
To answer your original question though, I guess the body type I find myself most commonly attracted to are the leaner, athletic bodied girls. I think this is because I have the same type of body but in guy form (I'm lean-cut and slender but don't have that thick weightlifter look). Again, I can still appreciate all sorts of body types, however.