for me aaaaa... normal aro i can say...
1.RED - blood red,chilli red,blue base....etc
2.Gold - Cross back,RTG,spoonhead....etc
3.yellow - YT, halfyellow
4.silver
5.Pearl

but some cases there is a rare aro liike Green, Platinum or the new one at JApan is Snow aro . It looks like silver but in white snow color. So up to you aaaa... but i personally don't like silver because it can grow up bigger. I want just a small aro onl;y