From everywhere except Magic Kingdom,
If the route is All Star Resorts, it's Sports, Music and then Movies 99.9% of the time. Magic Kingdom usually has seperate buses for each All Star. In the later afternoon, Studios and DTD do Sports and Music on one bus and Movies on another.
DAK may do all or one to each, depends on time of day.
Sometimes, they will start at Movies , then Music and finally Sports but that is not the norm and is usually in response to high loads at Sports and Music.
In answer to your question, most times, you will want to stay at Sports to get on the bus first at the resort. (but not always)