I kept forgetting to come back here and vote.
Going by the reasons as stated, mine would be,
1) Researcher Expedition Media (pictures, etc.
2) Researcher Discussions
3) PGF Discussions
I'd say my favorite section is the 'Film, Video, Photos, Audio'. I like to see pics and videos of possible evidence.
Even if not all are genuine, it's still good to see or listen to what's out there and gets posted on here.
Voted for A Flash of Beauty, their work is amazing.
Bigfoot Crossroads, Bigfoot Society, Wood Walkerz for interesting witness reports and general listening, others for more specific geographical or methodical interest.
I like the open mind of Dr. Anna Nikaris. She said in a speech there might be this Pendak animal out there, or Bigfoot, and so on. She discovered some new little monkey not previously known to exist. She gives an adult conversation/ presentation about the concept available on YouTube.