Question: What gauge of tennis string is best?
Thinner gauges offer more resiliency (ofen equated with "feel"). Thicker strings last longer. Thick, 15 gauge strings are generally used in beginner and some intermediate racquets. Most serious players who don't like to restring too often use 16 gauge. 17 and 18 gauge are for those who can afford string luxury. Each gauge has a light (L) variation that's a little thinner.
Index of 14 Strings Questions