"Alexa, ask the question of the day", a general knowledge quiz, so far I've amassed 875 points.
Ask for a Flash briefing, and you get the news headlines. I play the radio through my Echo devices as the radio reception here is almost non existent. I subscribe to Amazon music unlimited to take full advantage of their music library, it's £3:99 per month on one device only.
I like the night sky, so have enabled the Stellar skill. It tells you what you can see in the sky at any given time.
The DGC like 20 Questions, the Magic Door, (an interactive story), and Ditty.
You'll have to give them a try, to find out which ones you like. All the skills are on the Alexa app.