Personally, those chokepoint maps like astro craters, gap of rohan, dual gap, and wonder were my favorite when I first started playing. I think they are fun maps for noobs to learn the basics. They are simpler to play, and forgiving of mistakes. I think they should include them in the 1v1 ladder pool for players less than 500 rating.
Honestly, dual gap very fun for chill games. Its gotten old for me, but for years It was my favorite map.
Supreme commander is such a complicated game, and simple maps like astro make it accessible for new players.