I think I've posted in all of the areas at least a few times. I think the areas I don't really touch are mainly Trading / Wifi, ROM hacking / Game Dev, and Roleplay.
The Wifi area because a few years ago when I was actually interested in trading and competitive battling, I didn't have the wifi to be able to do it. I can connect to wifi just fine nowadays, though. I've pondered getting more into that sorta thing.
Also never quite got into ROM hacking or Game Dev like I wanted to at one point, either. It's interesting, and I admire people's skills in both of them, but I don't have the time for it myself. I dabbled in it once when I was pretty new here.
Lastly, not touching the Roleplay or writing areas is really ironic, because I've done tons of both of those things over the years. I love to write and roleplay, I just don't do it on forums, haha.