I like most of the pictures. The crowd, the dirt on the floors and the almost emotionless facial expressions give a good look at the "sense" of such a convention. The man in the wheelchair living his virtual life has something tempting - we don´t have to see his face. The three people sitting in the boring hall and staring at their Nintendo-screens, the boy waving with his Wii controller or the man smiling in front of the pistol-lady figurine are great. The two rockband pictures have nice layers in the different reflecting glass surfaces.
Many pictures (especially the "Sennheiser" picture) show perfectly the difference between the high-gloss-games world and the tristesse of the people who play the games.
The graininess and the high contrasts, even the dust on the negatives match with the debris in many of your pictures.
All together: Not a very positive look at a games convention, but a realistic one.