I think I've seen a few of threads on the subject come and go, if you search you might find some threads where people have detailed their experiences of morphs and aggression levels to see if there are any comparisons.
Corns on the whole have very good temperaments and that's why they're such a good "beginner" snake. Lucky for us they're beautiful as well! No you're right, they're not all docile, but the majority are
Just because you may not know - I didn't - a creamsicle is not a cornsnake morph, it's actually a hybrid (it has rat snake genes too). You'll find some folks don't like hybrids, or rather they don't like the misrepresentation of hybrids in pet shops etc, but as long as you're happy with your creamsicle, that's all that matters