Hiya Infectikan! Welcome to PC, awesome to have you aboard. :D
Lots of things go on here given how large the community is. We always have some sort of event or activity going on and new discussions pop up daily. What you can do here ultimately depends on your interests - you can roleplay, join some clubs, play forum games, trade or battle, download and play ROM hacks or other member-made games and so on. If you let us know a little about yourself I'm sure we can find things you'd enjoy here so do consider that sometime. n~n
Have an awesome time! I'm around if you ever need anything.