humidity yes.. salt content not really (or maybe im used to it already). your in Co right ? you will notice that the summers are brutal (100 plus degrees) , and unless you have the "old school's" air condition units "tuned" up , it's not really an enjoyable ride in the hotter months during the day w/ traffic (july, aug , early sept ) ..
my cars all hold up well, no rust and such.. the only special care i give is the car cover / windshield sun visor to help combat the u/v rays and lock in heat for the interior. other that that ... coolant flushes are a must every few years (to be preventative ) and evac / recharge for your a/c tunes. oh, and if your hard on your tires , they will wear faster in the summer months.
i can tell you that i have lived here 27 yrs and love the city and state , however i have family in Co and have visited off and on for the past 8 yrs, i would love to live in the loveland/ denver/ ft collins area for the climate/ scenery.
what part of h-town are you looking @ moving to ?