Class? depends the definition of:
If you mean Character classes: just play whatever you wanna play. I believe there is a break down list of what classes have what % of usage on server(s) but I'm unsure of its being up to date/validity. Both servers host a gaggle of good players, nice people & other awesome individuals that like to help so it may be best for you to feel it out for yourself & make an educated guess from there.
Hope this helps:
http://p1999.dmsimard.com/db/Classes