Hi, it's me again!
Do you have specific favourites from the soundtrack of the original Lemmings? I mean, I like the whole soundtrack (although How Much is that Doggie in the Window is one I like quite a bit less than the others, honestly), but there are some I'd have rather than others. I'm not counting the special graphics stages, here.
My two favourites are probably Twang and Pachelbel's Canon. Choosing a third one would be very hard, though... it could be any of these, I think:
Keep Your Hair On, Mr. Lemming, Rainbow Islands, Smile If You Love Lemmings.