Often baseball is called a game of failure and that is certainly true. I wanted to look at how many bases good hitters get per game which included hits, walks and hit by pitches.
So what I did was (total bases+walks+hbp)/games played.
Here are the active career leaders
1. Trout 2.81
2. Judge 2.73
3. Betts 2.6
4. Pujols 2.57
5. Votto 2.55
6. Bregman 2.53
7. Stanton 2.53
8. Bryant 2.52
9. Goldschmidt 2.52
10. Hoskins 2.50
A slightly above average hitter (about 750 OPS or so) had about 2 bases per game or 0.5 bases per plate appearance (trout 0.65).
I think that is a good start goal to shoot for. 2 bases is an ok day, 3 or more is a really good day, below 2 is not good.
Obviously the best is to not worry about stats and just hammer the ball (I like 2 hard hit balls per game as a goal which is about what top job hitters do) but if you need such an external goal I think that would be an easy to monitor goal that is easy to grasp for players (unlike complicated math stuff like OPS that is not intuitive).