For the Astros to win 103 games in 2018, it took quite a bit of talent, hard work, and some luck. Mostly talent, though. Houston had plenty of that stuff.
The 2019 season is another story as there isn’t a guarantee that the Astros will come close to 103 wins. Plenty of things have to break right for them; it is also too early to put a win total projection on the entire team. At the same time though, it doesn’t hurt to peek at the projections to see who is expected to perform well for the Astros.