None whatsoever, outside of this forum basically.
I'm not a particularly social person and am more inclined toward having a few close friends than just jumping into the fray as it were. A smaller group of people I know well, who coincidentally might share some interests (but not necessarily), is far more preferable than directly seeking out people who share the interest but who I might not otherwise gel with. I browse different communities based around things I'm interested in, but don't tend to participate. Generally more of a lurker.
Considering the reputation for drama that fandom seems to generate, according to people I've spoken to and/or whose accounts I've seen who have participated in them, it seems that I've no reason to change course anytime soon. No offense to anyone who takes part in any fandoms, do as you will and enjoy yourselves. No judgment here. It just overall seems like it's not for me.