In my opinion its all preference..... There's too many different styles to decide on a few criteria to judge them. It's all on an individual basis..... lol
Some like light base, some like purple in the dots, some like ones that look like Pearls, there's ones with just a few dots and lots of black lines, ones that have smeared spots that look like they're burning, Lots of big dots with little marbling, and ones that are just "different".
It may end up coming down to environmental factors that make not as nice ones nicer then really nice ones kept in poor conditions.....
They may end up being like lottery tickets and all you do is pick one and hope for the best. Lots of ugly ducklings out there, and situations just the opposite, It's what makes Marbles fun..... Nobody knows, just get whatever floats your boat, cause what you like mite not what be what everyone else likes, but it's your ray, not theirs....
