I think it depends on how many you have room for. I love the new Sterns and if I only had room for 3-5 games it would probably be all Stern games. But since I have room, I have a real appreciation for the B/W titles.
As someone who works on a lot of games I also have a greater appreciation of the QUALITY that B/W games have. I work on one of those and say that game was BUILT. You click the playfield up on a JD and you feel like you're moving something big. You lift a Stern playfield you're trying not to have it fly off the track and into the cabinet.
I think if you play any 1-2 games constantly they will get old.
Games that make you smile, giving Elvira multiple jackpots, Rudy taunting you, Sparky frying, engage you have no manufacturer boundaries. They are just great games.