Ok theory heads, here's a question for you: Why do so few rock baselines ever have a major 3rd in them? I'm sure there are exceptions, but I've been transcribing a bunch of classic and modern rock tunes (Rolling Stones, Grateful Dead, Radiohead) and I NEVER hear a major 3rd in these kind of songs! And not only that, but when I'm comping under a guitar and piano, if I do try and work a major 3rd in, it almost always sounds like crap. OK, so I realize that I am answering my first question -- but, from a theory perspective, why is this so? Thanks for any insight!