The categories are preety self explanatory... Lets also consider what they mean in term of development requirements.
Multimedia/Gamming - This means we will need to support the latest video drivers, develop a sound architecture, direct x clone(this includes direct draw and friends, direct input and supporting joystick drivers

Network Server - Most of these utilities are already under development and 0.4 roadmaps indicates that reactOS will be ready to asume such a roll.
Desktop/Office - OpenOffice already runs(it would be nice to get Microsoft Office to work), Printing support, Network Shares, email clients and the regular assortment of office apps.
Other - I was tempted to add a "I want it all!" option, but that would defeat the purpose... (everybody wants it all
