Demos I tried (at least one of these isn't a Next fest demo, but I hardly ever try demos, so...):
Caribbean Legend: Janky first X-Box era trash. Sucks because I've been weirdly feeling like a sailing/pirate sort of game lately.
Crown Wars: The Black Prince: This was a cool tactics RPG, I liked it a lot. Basically felt like someone said, "Hey, FFT was inspired by the 100 years war, so let's set something in the 100 years war that is inspired by FFT."
The only reason I probably won't D1P it is because my backlog is insane and March is already packed. Definitely going to want to pick it up though.
Dustgrave: A Sandbox RPG: Well, it's definitely that. You make a party of 4 and aimlessly wander around looking for quests and fights. Skills are basically generic modifiers on combat actions. There are 4 basic combat actions (dash, defend, light attack, heavy attack) that are modified based on your equipment and skills. Combat is turn based and where your attacks hit are based on the attack's shape (i.e. one sword might hack down and hit in a line, another might do a horizontal slash and hit a 180 arc in front of the character, etc.). I wasn't overly sure what to make of it at this point. Probably not something I'm interested in following though.
Guild Saga: Vanished Worlds: This was interesting, also a tactics style RPG. I played it long enough to know I'm interested in it, but I liked it significantly less than Crown Wars.
Faraway Lands: Rise of the Yokai: Base building tower defense RTS thing set in mythic feudal Japan. Interesting but similar to a lot of other real time city builders. It crashed on me when I clicked on building assignment to unassign and then re-assign a new worker too quickly in succession.
Son of the Dragon King: Shitty 3D beat 'em up thing. Terrible.
Shadow of the Depth: Gauntlet reimagined as yet another roguelite arena action thing, as played on mobile. Yet not bad, probably a decent timewaster if you're running it on a potato and if it's budget priced.
Deathbound: Souls-like crossed with the character swapping of like Valkyrie Profile. Kind of janky, but interesting. Felt decent to play, there's some interesting potential here, depending on how development progresses and what the final price point is.
Dungeonborne: Oblivion style dungeoneering with PvPvE arena matches. Except your character broke both his ankles. Combat speed is tuned for drunk senior citizens.
Granblue Fantasy Versus: Rising: Every anime ever made into a cheap feeling action game with JRPG level cutscenes. At AAA full price. heh. lol even.
Demo I didn't have time to try but looked interesting:
Millennia: I rate this one Civ/10.