It would be better to have 1 AMAZING piece that shows a mix of organic and hardsurface work then a number of bad ones. If your trying to get a job as an environment artist why would you have characters in there? It only shows employers that you don't really know what you want to do. "Oh he has props and environments and…
Environment portfolio should have environments. Making an environment or two gives you enough room to show your prop and hardsurface skills, so I don't see a point going out of your way to create some more. Show people that you can do good space layout, composition, color, mood and lighting. They can outsource props but…