There's quite a bit of "makes sense" entries due to stuff being acessible early. It is a bit surprising to me that even so the Hero's Helm gets so much play. I never played the kindgom game in a way which would unlock it at a time when i'd want it in the shops... Except once, but even then it turned out I unlocked it too late.
Bit surprised about the lack of bandits (they were my selective unlock monster along with gorgons and goats). Also, the goo is a bit of a wtf entry on the boss list untill you remember he spawns in the northern desert at easy mode. And the three goats on the list are also a bit obvious - makes me curious what the lists would look like without the "doooh" entries.
Gate scroll speaks about the number of profiles which reached a certain point, but is another "doooh" entry

Dwarven gauntlets are logical, I find it fun that I rarely ever preped them.
The dungeon attempts at the den of danger and venture cave are likely inflated by people trying stuff out in them without the intention of winning - if retreats are counted as losses, that it. Otherwise it just makes sense since the Den has had a quest for every basic class.
Berserker camp is just lol. Doubledoom seems to be what people just looking for a coffe-break experience are playing, you know, the "beta got bloated, all I want is an endlessly replayable dungeon" kind of thing. Just my bet.
TT has very few worshippers, but I bet it has more to do with his restrictive prep penalty than actual power. The boons granted is silly, Taurog and EM are structured in a way that encourages boon spam, and GG is as well.
@Darvin: Omg, you're right, 1.4 boons from Mystera? The heck is up with that? People just go for refreshment or mystic balance and call it a day?
EDIT: I do have an explanation for the 1.4 boons from Mystera - if what people mostly play is basic dungeons or doubledoom there's probably never any real need to take more than refreshment/mystic balance from Mystera. Still, not taking a level of "magic" every time along with either of the expensive ones is weird. It's practicaly her joining gift...