As always, Texans defensive star J.J. Watt was a big hit with fans on Day 2 of training camp. (Brett Coomer / Houston Chronicle) Despite a hard practice on a humid morning, J.J. Watt shortchanged nobody afterwards, not the multitude of fans who pleaded for his autograph nor the media, who never run out of questions for the NFL’s reigning Defensive Player-of-the-Year.