I find that it's tough to evaluate how much I like the color of a light source side by side with different lights since it unnaturally accentuates the differences. A cool light looks a lot bluer and a warm light looks a lot more orange when you're looking at them side by side at the same time, regardless of whether we're talking LED, CFL, or incandescent.

I find that I usually just have to take one home and use it to see how well I like it. When you're just using one color in a room, your eyes adjust to it and it's a very different effect from what you see in the store.