I'd personally like to see the Parella return since, as people have stated, they were quite underused. It would be nice to see them again and have them expanded upon a bit so that we could kind of get to know them better. As for the others, well... certainly it would be nice to see any of them at all, as I enjoyed each new race a whole lot, but I think my personal favorites would be the Mogmas, so those would be my next choice after the Parella as to who I would like to see. But really... any of them at all would be great; they were all very cute. :>