hitting deep and hitting short can both be good. if you hit deep consistently that takes your opponent behind the baseline and pushes pressure on them. if they are very deep you can hit a short ball and make them come in for an error.
With the new racquets and poly strings, the pros hit so hard that anything 1-2 feet past the service line is deep enough, and gives margin enough for error. How many shots do you hit long per match? How many shots do the pros hit long? And when the pros hit long how long is it? That is the poly strings, they pretty much take hitting long out of the equasion. It is rare to see a pro hit a ball more than a foot out. Yea, I understand that they are better than us, and that is part of the reason, but the other half is the poly, where when you hit long, you have to take a BIGGER swing at the ball to bring it down.
Then why don't you just use poly string?
I think Andy Murray is the perfect example of someone who doesn't possess a ton of raw power, but hits deep, penetrating shots.
In one sense we can answer this fairly easily. Hitting deep is not a bad thing.
But like about 90% of the questions, here, thre is a lot of information ommited that could be helpful in answering you in a way that could benefit you more.
Though hitting deep is considered good. Not having the ability to control the depth/placement of your shots is considered very-- not good.
So, it would help to know your grip, swing style, level of experience, lessons you may have had, how often you play, asperations for the future of your game, general fitness/athletic ability and knowledge of overall tennis tactics and strategies.
Some of this information could help us determine the causes of your weaknesses and help us make suggestions as to how you could control your shots better, drills you might practice, and so forth.
B
is hitting it deep into the baseline constantly a good thing?