I like buttercrunch, but actually, other than romaine, I just don't see all the taste variations that are reported to exist in lettuce.
I do notice textures, and bitterness... some is really bitter, and I don't care for bitter.
I am not big on salad dressings, and I like to mix various textures and colors, but it all tastes like... lettuce.
So, I add cucumbers, radishes, tomatoes, broccoli, cauliflower, lots of none lettuce items, and the lettuce is only there to pull it all together.
I like the crunch, in salads, or sandwiches, but the taste... I just don't see the differences either.
I suppose some of us just have better trained palates?
Think about it, if not for the visual and texture... could you close your eyes and tell one lettuce from another? I like buttercrunch... because of the crunch... texture. And it doesn't bolt for me... like most others.