People first started to really notice it when I took my Music Theory Diagnostic Exam as a freshmen in college, and I got 100% on it AND even labeled all of the examples (like what intervals were played - C to D, C to Bb, etc.) on the exam with their pitch names completely accurately. My Theory professor told me, after he had graded the exams, that in all of the twelve years that he had been teaching at the university, he had only met one other student with absolute pitch. He subsequently let me skip the Music Fundamentals class and go straight to Music Theory I. My "substitute" Theory prof said that it was a rare talent, something that would really come in handy when I graduated and started a career. Naming pitches doesn't stop there though. Oh no, I can even name chord names, with their inversions (most of the time) - instead of just naming the roman numeral and identifying the chord's context within a phrase. And best of all - I can identify a piece of music's key signature within the first 10 seconds or so of listening to it (that's my favorite attribute). I'm a little off on occasion, ESPECIALLY when tuning a guitar (I'm probably off by anywhere between 10 and 50 cents), but I still have it nonetheless. I delight in it. I relish it. I think in music, and I even seem to BREATHE it. Whenever I am doing something, there's always a song playing over and over in the back of my head like a background process in a computer CPU. Even as I type this very reply, I'm thinking of Dream Theater's "Octavarium," a song I've had a bit of an obsession about for a little while now. Seriously, music is beginning to feel like child's play to me at this point, so call me a conceited and arrogant ass, but I just can't help it! Anyway's to make a long story short - yes, I have perfect pitch (both relative and absolute).