Welcome back! There are a lot of forums available, it's fairly easy to rack up 100 posts. I personally like looking at General Discussion for interesting new topics, but there's also different areas of the site such as battling, achievements, etc. where you can easily pick up something to chat about. Or if you prefer less Subeta-orientated subjects, there are Chit Chat forums located much lower down, or if you can find a forum group that you relate to, there's lots of those that you can chat on c:

Useful Links:

What to do on Subeta? Useful general information for newbies Finding friends (Chit Chat) SubetaLodge (Offsite item database, pet colours etc.)
FAQ