I'll never forget the first time I listened to the Beatles song "Revolution" with the balance on my stereo panned hard right (I think). I'm waiting for the into, and waiting, and thinking that I'm hearing the guitar part, but it's super quiet. So, I turn it up, thinking that something is wrong, and put my ear REALLY close to the speaker, when all of a sudden, John is screaming "AAAAAAAAAAAAAAAHHHHHHHHH" in my ear. F-ing balance...
To the point of the thread, I've been totally spoiled since I first set foot in a studio. Had to buy nice speakers for the home, and I can barely listen to the radio anymore. The worst part is that I've now spoiled friends of mine inadvertently, too, by showing them what they were missing. If you've got nice speakers, some time listen to the radio through them. When a song comes on that you have a CD to, listen to it while you cue up the CD. Then, switch over to the CD version. Your friends will be appalled.
so to answer your question, Yes, you're now ruined. Welcome to the ranks!
-mg