My all-time favorite OPI is All Rose Lead to Rome from a few years ago. ♥♥♥
I know what you mean about it being difficult to choose what to try, their selection can be overwhelming. Some favorites that are still available are: Dating a Royal (a yummy royal blue jelly), Dutch Tulips (a reddish coral), Green-wich Village (a funky green creme), Un-for-greta-bly Blue (from the recent Germany collection), DS Extravagence (similar to Zoya Blaze)... I think it would be hard to go wrong in picking a creme in your favorite color. They
Other favs that probably are still available: Houston we Have a Purple, pretty much all over the Holland collection, the Pirates of the Caribbean collection, Goldeneye from the recent James Bond collection.