Research
From Neocron Wiki
Why to choose research?
Well with research you can make blue prints of all non-rare weapons except epic items or Jones items but oh well it is still a good skill to have and is one of the main tradeskills.
If you become a researcher it will start of slow for you until you get a little higher in the skills you need to research as with any character.
It is quite a hard thing to do, meaning you only level intellegance but you can also level the other skills.
Both researchers and constructors are needed When it comes to making a quality weapon, So in general, researchers, like constructors, are generally very valuable to whoever needs their services. However, without the pursuit of item parts, being a researcher is slightly easier in a way.