I spent a good long time browsing through the piles of thumbnails to make myself a tall list. It's a mix of games I'm excited for, games that look interesting to me, and weird games. Since I spent so much time today browsing for games, I haven't actually played much today on day 1.
Some thoughts on my list
Bits & Bops has already had a demo for months now, but for Next Fest, there's a new minigame to play. Also, I backed this game on Kickstarter, so I'm obviously interested in seeing this game be good. And I think it is.
SourceWorld is a Half-Life 2 mod participating in Next Fest! It's an FPS dungeon crawler! The Source engine isn't dying anytime soon.
Oddcore has a really flashy trailer. I actually first heard of it from seeing it get front page attention on Newgrounds. It could be the first game set in "liminal spaces" that isn't utterly boring or crap.
Funi Raccoon Game is on this list because the trailer is stupid and I want to see more of it. I have high hopes.
Why, yes, those are three games featuring a black cat as playable character.