Sin gets used the most and I just picked up blunt which I love. I like a lot of the colors in Naked 1; smog, half baked, toasted. I also got Shattered but haven't used it yet.
I got a set that has verve, suspect, dark horse, and woodstock (it's pink!) with a whiskey liner for $10 and it's the best (minus the woodstock). They no longer have it but those colors are great.