Kes is not hot, was never hot, could never be hot. She went from being like some Happy Days girl in a poodle skirt to looking like a jaded PTA mom and there was no hotness in between. And yes I believe there are hot versions of both the poodle skirt and the PTA mom but Kes was not one of them. Ever.
Every single person on that ship including Neelix was hotter than Kes.