i agree with yellow polyps... other than that, they're all pretty nice, but there are some that i wouldn't want to own... but if you're a collector like most, you really don't care about how they look... you just want them because they're different...
i'm into proto paly's... i'm looking for nuclear winters, red barons, eye of death, yellow deaths, big bangs, purple lamborghini and other protos... half of those aren't as pretty as say nuclear greens, but because they are around, i want them...