I listen to classic rock radio usually because I dont have an ipod and it takes too much time deciding on what cds to play.
I enjoy classic rock when it's stuff like Zep, Floyd, Rush, Sabbath, Queen, The Doors, CCR, Steely Dan, Deep Purple, Thin Lizzy and so on. If there's a song that I get tired of from being played too much, I'll just change it to something else, usually the jazz or funk station.
When I go for a long time without hearing certain songs because I got tired of hearing them, when I listen to them again after an extended period it can be a great rediscovery.
And since I've avoided Skynyrd for a good while, someday I might get into them again, who knows?
I will always hate Foreigner though.