Reason the defensive players prosper in D3 or D2 level is lack of top level talent. Especially in singles, unless you are elite level D1 talent, it is very difficult to play power attacking game and be consistant enough to win day in day out. and you have to serve in 120's with good placement consistantly to get 1 or 2 cheap points in your service game.
How many D3 guys do you know that can do that ?
Willing to hit all day and chase down everything is show of mental strength and conditioning. Look at it that way.
I know guys in college want to play Jame Blake type of tennis, flashy and powerful. It is fun. but then remember, he is top ATP level talent, and you could see that when he was playing for Harvard, way back when.
Babolat Pure drive 2012, 55 lbs, Kirschbaum Proline X / X-1 biphase. Nalbandian backhand and Nadal forehand.