Atari MS BASIC did get much love back in the day. I, personally, have always liked it. It's fast, easy translate programs in and has lots of features.
So, a while back, I wrote a couple simple games for in Atari MS BASIC. Uno (the card game) and Awari (see David Ahl Computer Games book for description) to make a little demo of it's capabilities.
I can't remember If I posted these a while back, my check i didn't see any, but if i did I apologize. I been hang out in the TI99 forum for a