Specifiying a Subject
Keep things focused. Never write a paper about all of your work! Leave that to the art historians who will compile your oeuvre when you are old and rich and famous, if not indeed already dead… ;-)
You may, however, want to write about more than one project if there is a strong thematic link between them. Do the same keywords apply in all cases? Is there a similarity in intention? Is there a similarity in output or results/impact? Can you use the same references for all of your material? Just the fact that a number of projects are video based, or all involve coding, or have been created in a particular environment or under general concepts (such as, say, “art and technology” or “interfaces” or “gaming” or “ubiquitous computing”) is simply not good enough in itself. There has to be a thematic link which comes naturally and one which makes sense, which does not make it look like an arbitrary decision to place these projects all in one pot. As an example: I have been working on 3 projects in Second Life lately which I have written up as papers to submit to several conferences: Two of them can be thematically linked since they both concern embodiment and the usage of the avatar as an art object. Also both projects ask of the viewer to look at their own physical bodies through the usage of virtuality. The third concerns creating heteronyms through multiple avatars. While all three projects have been created in Second Life, all are visual, all involve avatars even, there is only a thematic link between the first two projects, the third is a thing apart, needs a different literature survey and so forth. So, if I were to attempt to write a paper which covers all three projects my chances of achieving anything halfway coherent would be pretty much non-existent, whereas contextualizing the first two projects within one framework comes more or less naturally since they both address the same issues. They are in fact sister projects.
So, is all the material you want to cover strongly related? Is there a red thread? One that goes beyond general categorizations and can be pin-pointed into quite specific keywords and concepts? These are the types of questions that you need to ask yourself at this point.