i only keep oedura castelnaui, so i can only comment on them!
there great geckos, hardy, easy to look after and show great patterns/colouration.
i can also suggest two websites which really helped me in the search for my first geckos.
theres great articles and pictures on
www.aussiegeckos.com which is owned by Troy Webb (ari)
also cant go past geckodans site
www.geckodan.com both of them are really well set out provide great info and pictures.