Warner Brothers created a choose-your-own-adventure game for Alexa called The Wayne Investigation, wherein you investigate the death of Bruce Wayne's parents, Thomas and Martha Wayne. Start the game by saying, "Alexa, open The Wayne Investigation" and follow the prompts. Each choice you make affects the outcome of the story. This is one of the best examples of a game style that suits Alexa perfectly.
Alexa Skills themselves are quite helpful. However, even with an updated Skills section in the Alexa app and the ability to add skills using only your voice, discovering new and useful skills is a less than desirable experience. So much so that Amazon actually created a skill called Skill Finder which, you guessed it, helps you discover new skills. Launch it by saying, "Alexa, open Skill Finder" or "Alexa, tell Skill Finder to give me the skill of the day."
If you want to do some casual research for a future trip, you can get fare estimates using the Kayak skill. You can say, "Alexa, ask Kayak where I can go for $400" or "Alexa, ask Kayak how much it costs to fly from Los Angeles to Dublin." The skill will ask for additional information and eventually provide you with a series of options and price ranges.