That melt in your mouth kinda feeling... For me, I love butter that feels like a pillow between my cheeks. The one that slides in your mouth like a kid at a water park.
Salty-ness
Salty just like me. I love the sweet and salty complex, and considering I mainly eat butter with chocolate chip pancakes (sweetness all around), it is nice to have a light punch of Salt to balance out my sweet tooth.
Creaminess
AKA: Richness and Density Personally, I am a fan of "lighter" butter. Not light butter, the butter you buy to feel healthier, but lighter butter in the sense of wispy clouds and not a brick on my tongue butter.
Spreadability
#1 leading cause of death in the United States: Hard butter on warm toast. Just Kidding... but it is the #1 cause of frustration in my life, aside from School Work, lack of money, or things that actually matter.