Posted:Not sure if you mean colours or types of poi. But I'll answer both.
As for colour its personal preference, but be aware that the blues/greens/whites are much brighter than the reds/yellows.
I like crystal poi, only one light but they are much less cumbersome than duos and with flowmass they are weighty enough. If you dont mind the length of the duos the extra light would probably give you more wow factor though.
Posted:flowtoys will change you collors for free just send them back to them with a note. also the air is stuning and both watter 1 and watter 2 are sick. the new luck that just came out are a bit fragile. im told the case for them is not as strong as the rest of the elements such as air,watter 1&2,fire and love.