Shortly after becomming a Staff Pro at the local Public Facility ...I got a dream client. 3 Sparring Sessions a Week, which is a Private in which the client is an Advanced player capable of keeping only as many as 6 balls..alive over the net and inbounds MUCH more than walking around picking up balls! THIS is, many times, a Staff Pro's "fun tennis"!
This is to say that's what you're wanting to achieve, is the goal of most beginning AND intermediate players. One in which, on demand, you can hit a 2 by 2 target from about 33 feet away and very consistantly. Then Drill with consistancy with a running formula in your mind ..one of Place over Pace ..that, in your shot selection ..you endeavour not to hit the ball harder than you can hit it over the net and in bounds.
If you have ur mechanics right..so as not to tax your arm, etc..then "The Practice Wall" can do this for you. I like a block wall..not a "backboard" so much..because of the response coming off the wall. Also..it's no pressure ..whcih is, many times, the problem with consistency.
When you're able to hit the ball with tremendous consistency ..picking and choosing how hard or how much spin you want..then you become a Club Pros dream job! Dan