Talk about everything! Your surfing level, the waves you chase most often, and what you want the board to do. Mention if you want more speed, tighter turns, or better paddle power. Discuss dimensions, but trust their expertise on fine-tuning the foam. Talk fin boxes (thruster, quad, single?) and tail shapes. The more you share about your surfing life, the better they can translate your vision into foam and fiberglass. It’s all about creating your perfect wave-riding partner.