Deeper voices are OK. Aggressiveness and masculine traits are OK (tomboys are hot). It's really the "intelligence" part, only it.

Women that are too intelligent generally either go too fast (and if you respond with a "wow slow down there, miss" they immediately reject you), or they pretend to be dumb but later on they stab you in the back and go whore around with other men.

Too much "intelligence" is a sign of unsubmissiveness.

It's all about submissiveness.

If you believe yourself "intelligent", want to be "independent", well, go have fun with your toy men, leave me alone, simple as.