At what point did you realize that your classic rock station just played the same songs over and over?

For me, it was senior year of high school, when I realized that the songs were always the same, and that if I didn't stop listening to 98.5 WNCX ('Cleveland's Classic Rock!'), I'd hate Led Zeppelin and Rush for the rest of my life. So, considering I began listening to the radio on my own at about 12, that would have been about 6 years of full-on, non-stop immersion. Then in college, thankfully, I discovered that there were actually good songs out there that weren't on the radio (*gasp*). But I'm still amazed that when I do find myself driving somewhere without a CD to pop in, that station STILL plays the same rotation.