It's pretty much a guessing game to me, if a series has several nice figures I take the gamble and try and get the ones I want, but this doesnt always happen sadly enough.
Never was able to get the king of series 4, tried to feel for the cape but theres a lot of figures with capes in that series. I have them all aside from the king.
Had descent luck today with series 5. First time I took a chance with the girl figures since I want that archer lady. Bought 4 girl figures and 2 boy figures.
Results was:
-1 Viking.
-1 asian warrior in gold armor.
-Pink princess.
-princess with flowers.
-Tennis girl.
-Yellow fairy.
Not that bad considering I stick with collecting medieval and pirate themes and nothing else, I try to find figures that work for that.
Already have a few vikings so he can join that group, the asian warrior can be used in a story as a traveler from a distant land, the pink princess will probably be used a lot as a background figure and maybe a minor role sometimes, and the fairy looks very nice. Might remove the wings and give her a cape to cover up the hole.
Not too fond of the flower princess, parts might be useable to mix with other figures if I get more though. tennis girl is nice but not my theme. Again, parts can be used. Just glad I didnt end up with aliens or such since then I might not even get useable hairstyles.