It would be nice to be able to add my own load types so that way I can use the load combination generator to create custom load combinations. Some load cases that I use are specific that that involve different "uses" of the same type of load. So I may have several different loads of the same type, but they are not all there simultaneously and would show up in different load combinations (for example I may have a fluid load for testing that uses water and a fluid load for operation that uses oil or a slurry. So I will want to apply the testing fluid load in the dead load combo, but the operation fluid load in the seismic combo.). To be able to identify them as different names of the same type would allow me to use the custom combo generator where as right now I can't.
I know I could always use one of the load types that are already preinstalled, but the predefined names don't really match the load so its hard to remember what type I should use.
There has been similar requests for this capability for a variety of reasons. The categorization itself is not a fundamental part of the analysis processing, it has been implemented so that we can generate combinations based on the rules associated with the defined categorization. If this was provided in an unrestricted format, then the method to validate what rules should apply in the generator could become more complex to manage. However saying that, it is certainly something that can be investigated further and as such should be added to the backlog.