-Work should answer basic questions teams want on quality, tools, craftsmanship
-Avoid tropes you see in many other portfolios
-Every piece should be a self expression of you
-Put in surprises
-Have fun with it
Let me explain...
Your entire portfolio should represent what you are fully capable of as an artist. It is putting your best foot forward. It should impress and show that you understand fundamental day in and day out roles of the job from craftsmanship to technical prowess
Make pieces that standout. Dont do the same substance brick material you see on a lot of portfolios or scenes like sci fi hallways or others. If you must do these make sure you're doing something with them that is unique and clearly stand outs
Continuing on this point, showcase who you are. Talk about stories or topics that you are passionate about. Find ways to incorporate that into scenes or pieces you are making. Go into interviews and articulate why you made the scene on an emotional level
This encompasses the last two points. Put in pieces that are unexpected but delightful to see in a video game artist portfolio. Think of your portfolio as telling a story. Dont forget, we are storytellers and entertainers. Cant win with just craftsmanship alone.
Show you're having fun in the work. This goes back to putting things in many other portfolios have. Make pieces with confidence and put things that interest you into each piece. No matter the size.
Tell me a compelling story about the thing. Put in a joke or a clever take on the piece. Build with confidence about your craft and who you are.
Do what you absolutely love doing. If you love the building of vehicles or weapons and that is all you want to do, go for it. It will be hard but no one should tell you to change path if you absolutely love what you make.
Build environments
Do what you love but widen your availability of what you can do