Lukhas's post is right on I think, you definitely want to base your game/strategy around your strengths. Here's a recent example of how I got beat by good strategizing.
I played a serve and volley player with terrible ground strokes the other day, and he beat me. How? By good strategizing. He knew he couldn't beat me from the baseline(which is my strength) so he took that away from me and S&Ved every point to my backhand. Not only was he hiding his weakness(ground strokes), he was using his strength(big serve) against my weaker wing(backhand) and he won the match.