Each of the building pieces seems like you just grabbed the diffuse and threw it into crazybump. IMO this is not a great idea. You can't have a high poly source for everything obviously, but you should really try to make high polys when reasonable. Looks like some of your props may have been made with a high poly model…
I think the breakdown you have for the bike is a little much....I dont believe its really necessary to show a diffuse, spec, shadow, final gather and then an ao pass....for a gaming reel(im assuming you DO want to get into gaming) people arnt going to care that you have fancy rendering going on in your model. I say make it…