I like iceberg, but because I am lazy, I prefer romaine. It comes in nice, big leaves, loosely attached. That makes it really simple to tear off just what you need for your sammitch, and you can cut/tear some up for salad, without getting those big, thick stalk-looking chunks that always show up in iceberg-heavy salads.
I know a guy in his fifties who remarked to me that, when he was a kid in Illinois, lettuce WAS iceberg. That's all there was. And this guy's family was in the grocery business. It was the same in the 90s, at least as far as I knew.
The fact that we have 79 varieties of everything at the grocery store is something I really like about the current millennium.