I had always thought Cassino, Jack and Super Fairy were interesting but I've come to realize they're just eccentric. Mostly Cassino and Super Fairy, Jack is just.. Jack. >_>
The truly interesting people are the ones like poopnoodle, Patchisou and Sammi San. I feel like they each bring a fresh personality to the community that helps to break from the monotony of things.
Poopnoodle isn't afraid to bring a mature discussion to the table, at all. The best OC threads I've read are more time than not hers. She's pretty intelligent as well if my opinion matters.
Sammi San just has an interesting life? Lol, I like reading her posts in ovp. They're well thought out whether she puts time into them or not, her posts feel like blog updates or something along that line and that's cool to me.
Patchisou has got to be my favorite h staff. He consistently shows his levelheadedness in dealing with community situations, and I like his views on involving the community more in.. PokeCommunity.